CVE-2016-0034

CRITICALNVD 8.89.0
EchelonGraph scoreHIGH confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-05-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. The 9.0 is the floor for confirmed exploitation, not an impact rating: this CVE's impact severity (EG Severity) is CVSS 8.8 HIGH under GitHub Security Advisory CVSS. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: CISA Known Exploited Vulnerabilities catalog, EPSS, GitHub Security Advisory, NVD CVSS v3
Exploited in the wild

Also known asEUVD-2016-0072 (ENISA EUVD) · GHSA-8wh9-64cq-2gj5 (GitHub Security Advisories)Source: ENISA EUVD

9.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low or medium mission impact
CISA-KEV: ExploitedEPSS PROB: 69%CVSS: 8.8Exploit: No code on recordExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

Microsoft Silverlight 5 before 5.1.41212.0 mishandles negative offsets during decoding, which allows remote attackers to execute arbitrary code or cause a denial of service (object-header corruption) via a crafted web site, aka "Silverlight Runtime Remote Code Execution Vulnerability."

CVSS v3
8.8
EG Score
9.0CRITICALhigh confidence
EG Risk
80
EG Risk 80/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity88% × 45%
Impact severity (EG Severity): CVSS 8.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation100% × 40%
Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Attend at medium and Act at high mission impact.
Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low, sooner than that at medium and as soon as possible at high mission impact.
EPSS PROB
69%
EPSS %ILE
99th
KEV
⚠ Exploited

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is the CISA KEV floor for confirmed exploitation, not an impact rating: its impact severity (EG Severity) is CVSS 8.8 HIGH.

EG Severity
8.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
69% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Attend at medium mission impactTrack at low, Attend at medium and Act at high mission impact.CISA BOD 26-04: 3 days & forensic triage if the affected system is publicly exposed; 14 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: this CVE is in CISA's KEV catalog, and CISA's required action for it, quoted below, applies whether or not a fix is released.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Attend at medium and Act at high mission impact.

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low, sooner than that at medium and as soon as possible at high mission impact.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days & forensic triage if the affected system is publicly exposed; 14 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: this CVE is in CISA's KEV catalog, and CISA's required action for it, quoted below, applies whether or not a fix is released.

The score's inputs: In CISA KEV yes (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

CISA required action“The impacted products are end-of-life and should be disconnected if still in use.”

Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. CISA's notes: https://nvd.nist.gov/vuln/detail/CVE-2016-0034

Published

January 13, 2016

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Nov 9, 2026
⚠️ Actively exploited (CISA KEV, CISA Vulnrichment). Fix referenced — no release confirmed yet. Sources: cisa.
CISA🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-0034
Web page

Microsoft Security Bulletin MS16-006 - Critical | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-006

Vendor Advisories for CVE-2016-0034(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 52× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 1,160 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 1,060 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 20:20 UTCEchelonGraph re-scored
  2. 2026-11-12 20:20 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  3. 2026-11-12 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
  4. 2026-11-11 22:39 UTCEchelonGraph re-scored
  5. 2026-11-11 22:39 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  6. 2026-11-11 16:28 UTCEPSS rescoreEPSS 69% · 99th percentile
  7. 2026-11-11 00:58 UTCEchelonGraph re-scored
  8. 2026-11-11 00:58 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  9. 2026-11-10 16:30 UTCEPSS rescoreEPSS 69% · 99th percentile
  10. 2026-11-10 03:18 UTCEchelonGraph re-scored
  11. 2026-11-10 03:18 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  12. 2026-11-09 05:38 UTCEchelonGraph re-scored
  13. 2026-11-09 05:38 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  14. 2026-11-08 07:58 UTCEchelonGraph re-scored
  15. 2026-11-08 07:58 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  16. 2026-11-07 16:29 UTCEPSS rescoreEPSS 69% · 99th percentile
  17. 2026-11-07 10:18 UTCEchelonGraph re-scored
  18. 2026-11-07 10:18 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  19. 2026-11-06 12:33 UTCEchelonGraph re-scored
  20. 2026-11-06 12:33 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  21. 2026-11-05 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
  22. 2026-11-05 14:53 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  23. 2026-11-04 17:13 UTCEchelonGraph re-scored
  24. 2026-11-04 17:13 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  25. 2026-11-04 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
Show 75 more
  1. 2026-11-03 19:32 UTCEchelonGraph re-scored
  2. 2026-11-03 19:32 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  3. 2026-11-03 16:32 UTCEPSS rescoreEPSS 69% · 99th percentile
  4. 2026-11-02 21:52 UTCEchelonGraph re-scored
  5. 2026-11-02 21:52 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  6. 2026-11-02 00:11 UTCEchelonGraph re-scored
  7. 2026-11-02 00:11 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  8. 2026-11-01 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
  9. 2026-11-01 02:29 UTCEchelonGraph re-scored
  10. 2026-11-01 02:29 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  11. 2026-10-31 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
  12. 2026-10-31 04:49 UTCEchelonGraph re-scored
  13. 2026-10-31 04:49 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  14. 2026-10-30 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
  15. 2026-10-30 07:09 UTCEchelonGraph re-scored
  16. 2026-10-30 07:09 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  17. 2026-10-29 09:29 UTCEchelonGraph re-scored
  18. 2026-10-29 09:29 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  19. 2026-10-28 11:49 UTCEchelonGraph re-scored
  20. 2026-10-28 11:49 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  21. 2026-10-27 16:26 UTCEPSS rescoreEPSS 69% · 99th percentile
  22. 2026-10-27 14:08 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  23. 2026-10-26 16:28 UTCEchelonGraph re-scored
  24. 2026-10-26 16:27 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  25. 2026-10-25 18:46 UTCEchelonGraph re-scored
  26. 2026-10-25 18:45 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  27. 2026-10-25 16:26 UTCEPSS rescoreEPSS 69% · 99th percentile
  28. 2026-10-24 21:04 UTCEchelonGraph re-scored
  29. 2026-10-24 21:04 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  30. 2026-10-24 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
  31. 2026-10-23 23:24 UTCEchelonGraph re-scored
  32. 2026-10-23 23:24 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  33. 2026-10-23 01:42 UTCEchelonGraph re-scored
  34. 2026-10-23 01:42 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  35. 2026-10-22 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
  36. 2026-10-22 04:02 UTCEchelonGraph re-scored
  37. 2026-10-22 04:02 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  38. 2026-10-21 16:26 UTCEPSS rescoreEPSS 69% · 99th percentile
  39. 2026-10-21 06:18 UTCEchelonGraph re-scored
  40. 2026-10-21 06:18 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  41. 2026-10-20 16:26 UTCEPSS rescoreEPSS 69% · 99th percentile
  42. 2026-10-20 08:38 UTCEchelonGraph re-scored
  43. 2026-10-20 08:38 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  44. 2026-10-19 10:55 UTCEchelonGraph re-scored
  45. 2026-10-19 10:55 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  46. 2026-10-18 13:14 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  47. 2026-10-18 10:57 UTCEchelonGraph re-scored
  48. 2026-10-17 16:26 UTCEPSS rescoreEPSS 69% · 99th percentile
  49. 2026-10-17 15:32 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  50. 2026-10-16 17:51 UTCEchelonGraph re-scored
  51. 2026-10-16 17:50 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  52. 2026-10-15 20:09 UTCEchelonGraph re-scored
  53. 2026-10-15 20:09 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  54. 2026-10-15 16:26 UTCEPSS rescoreEPSS 69% · 99th percentile
  55. 2026-10-14 22:25 UTCEchelonGraph re-scored
  56. 2026-10-14 22:25 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  57. 2026-10-14 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
  58. 2026-10-14 00:44 UTCEchelonGraph re-scored
  59. 2026-10-14 00:44 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  60. 2026-10-13 16:26 UTCEPSS rescoreEPSS 69% · 99th percentile
  61. 2026-10-13 03:03 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  62. 2026-10-12 20:48 UTCEchelonGraph re-scored
  63. 2026-10-12 05:21 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  64. 2026-10-12 01:27 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  65. 2026-10-11 21:35 UTCEchelonGraph re-scored
  66. 2026-10-11 21:35 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  67. 2026-10-11 17:42 UTCEchelonGraph re-scored
  68. 2026-10-11 17:42 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  69. 2026-10-11 13:48 UTCEchelonGraph re-scored
  70. 2026-10-11 13:48 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  71. 2026-10-11 13:40 UTCEPSS rescoreEPSS 69% · 99th percentile
  72. 2026-10-11 09:55 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  73. 2026-10-11 06:02 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  74. 2026-10-11 02:08 UTCGHSA enrichmentGHSA-8wh9-64cq-2gj5 · GitHub severity HIGH · GitHub CVSS 8.8
  75. 2026-10-10 22:12 UTCEchelonGraph re-scored

Frequently asked(6)

What is CVE-2016-0034?
CVE-2016-0034 is a critical-severity vulnerability; its CVE record was published on January 13, 2016. Microsoft Silverlight 5 before 5.1.41212.0 mishandles negative offsets during decoding, which allows remote attackers to execute arbitrary code or cause a denial of service (object-header corruption) via a crafted web site, aka "Silverlight Runtime Remote Code Execution Vulnerability."
When was CVE-2016-0034 made public?
CVE-2016-0034 was made public on January 12, 2016: that is the date its CVE record's CNA, Microsoft Corporation, gives for when the vulnerability was made public. The CVE record itself was published on January 13, 2016. EchelonGraph's copy of the record carries a last-modified date of August 14, 2026; the record at its source may have been updated since.
Is CVE-2016-0034 actively exploited?
Yes. CISA added CVE-2016-0034 to the Known Exploited Vulnerabilities catalog on May 25, 2022, affecting Microsoft Silverlight. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation.
What is the CVSS score of CVE-2016-0034?
CVE-2016-0034 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
Which products are affected by CVE-2016-0034?
CVE-2016-0034 affects Microsoft Silverlight.
How do I remediate CVE-2016-0034?
A fix for CVE-2016-0034 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2016-0034 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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