CVE-2016-15021

CRITICALNVD 5.59.8
EchelonGraph scoreMEDIUM confidence

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

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-01-17. NVD baseline CVSS 5.5; sources differ by 4.3.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2016-2090 (ENISA EUVD) · GHSA-r74c-ppq4-773h (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 5.5Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

A vulnerability was found in nickzren alsdb. It has been rated as critical. This issue affects some unknown processing. The manipulation leads to sql injection. Upgrading to version v2 is able to address this issue. The identifier of the patch is cbc79a68145e845f951113d184b4de207c341599. It is recommended to upgrade the affected component. The identifier VDB-218429 was assigned to this vulnerability.

CVSS v3
5.5
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

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)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.7%
EPSS %ILE
54th
KEV
Not listed

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

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.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 every mission impact level.

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

Published

January 17, 2023

Last Modified

November 21, 2024

References (4)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 61× 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 251 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 151 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 08:54 UTCEchelonGraph re-scored
  2. 2026-11-13 08:54 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-12 16:27 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  4. 2026-11-12 09:12 UTCEchelonGraph re-scored
  5. 2026-11-12 09:12 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-11-11 16:28 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  7. 2026-11-11 09:29 UTCEchelonGraph re-scored
  8. 2026-11-11 09:29 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-11-10 16:30 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  10. 2026-11-10 09:47 UTCEchelonGraph re-scored
  11. 2026-11-10 09:47 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-11-09 16:27 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  13. 2026-11-09 10:05 UTCEchelonGraph re-scored
  14. 2026-11-09 10:05 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-11-08 16:29 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  16. 2026-11-08 10:21 UTCEchelonGraph re-scored
  17. 2026-11-08 10:21 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-11-07 16:29 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  19. 2026-11-07 10:33 UTCEchelonGraph re-scored
  20. 2026-11-07 10:33 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-11-06 16:28 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  22. 2026-11-06 10:51 UTCEchelonGraph re-scored
  23. 2026-11-06 10:51 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-11-05 16:27 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  25. 2026-11-05 11:09 UTCEchelonGraph re-scored
Show 75 more
  1. 2026-11-05 11:09 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-11-04 16:27 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  3. 2026-11-04 11:27 UTCEchelonGraph re-scored
  4. 2026-11-04 11:27 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-11-03 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  6. 2026-11-03 11:45 UTCEchelonGraph re-scored
  7. 2026-11-03 11:45 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-11-02 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  9. 2026-11-02 12:02 UTCEchelonGraph re-scored
  10. 2026-11-02 12:02 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-11-02 10:25 UTCOSV refresh
  12. 2026-11-01 16:27 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  13. 2026-11-01 12:19 UTCEchelonGraph re-scored
  14. 2026-11-01 12:19 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-31 16:27 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  16. 2026-10-31 12:38 UTCEchelonGraph re-scored
  17. 2026-10-31 12:38 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-30 16:27 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  19. 2026-10-30 12:56 UTCEchelonGraph re-scored
  20. 2026-10-30 12:55 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-29 16:27 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  22. 2026-10-29 13:14 UTCEchelonGraph re-scored
  23. 2026-10-29 13:14 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-28 16:26 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  25. 2026-10-28 13:29 UTCEchelonGraph re-scored
  26. 2026-10-28 13:29 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-27 16:26 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  28. 2026-10-27 13:38 UTCEchelonGraph re-scored
  29. 2026-10-27 13:38 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  30. 2026-10-26 16:26 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  31. 2026-10-26 13:24 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  32. 2026-10-25 19:48 UTCEchelonGraph re-scored
  33. 2026-10-25 16:27 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  34. 2026-10-25 13:29 UTCEchelonGraph re-scored
  35. 2026-10-25 13:29 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  36. 2026-10-24 16:27 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  37. 2026-10-24 13:46 UTCEchelonGraph re-scored
  38. 2026-10-24 13:46 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-10-23 16:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  40. 2026-10-23 14:04 UTCEchelonGraph re-scored
  41. 2026-10-23 14:04 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  42. 2026-10-22 16:27 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  43. 2026-10-22 14:19 UTCEchelonGraph re-scored
  44. 2026-10-22 14:19 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  45. 2026-10-21 16:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  46. 2026-10-21 14:22 UTCEchelonGraph re-scored
  47. 2026-10-21 14:22 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-10-20 16:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  49. 2026-10-20 14:14 UTCEchelonGraph re-scored
  50. 2026-10-20 14:14 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-10-19 16:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  52. 2026-10-19 13:19 UTCEchelonGraph re-scored
  53. 2026-10-19 13:18 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-10-18 16:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  55. 2026-10-18 12:33 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  56. 2026-10-18 10:53 UTCEchelonGraph re-scored
  57. 2026-10-17 16:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  58. 2026-10-17 12:44 UTCEchelonGraph re-scored
  59. 2026-10-17 12:43 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-10-16 16:28 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  61. 2026-10-16 13:01 UTCEchelonGraph re-scored
  62. 2026-10-16 13:00 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  63. 2026-10-15 16:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  64. 2026-10-15 13:18 UTCEchelonGraph re-scored
  65. 2026-10-15 13:18 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  66. 2026-10-14 16:27 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  67. 2026-10-14 08:23 UTCEchelonGraph re-scored
  68. 2026-10-14 08:23 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  69. 2026-10-13 16:27 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  70. 2026-10-13 03:38 UTCGHSA enrichmentGHSA-r74c-ppq4-773h · GitHub severity CRITICAL · GitHub CVSS 9.8
  71. 2026-10-12 20:45 UTCEchelonGraph re-scored
  72. 2026-10-12 16:27 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  73. 2026-10-12 01:09 UTCEchelonGraph re-scored
  74. 2026-10-11 13:40 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  75. 2026-10-10 19:54 UTCEPSS rescoreEPSS 0.7% · 51st percentile

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Frequently asked(5)

What is CVE-2016-15021?
CVE-2016-15021 is a critical-severity vulnerability; its CVE record was published on January 17, 2023. A vulnerability was found in nickzren alsdb. It has been rated as critical. This issue affects some unknown processing. The manipulation leads to sql injection. Upgrading to version v2 is able to address this issue. The identifier of the patch is cbc79a68145e845f951113d184b4de207c341599. It is…
When was the CVE record for CVE-2016-15021 published?
The CVE record for CVE-2016-15021 was published on January 17, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2016-15021 actively exploited?
CVE-2016-15021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-15021?
CVE-2016-15021 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 9.8 (CRITICAL).
How do I remediate CVE-2016-15021?
The CVE record for CVE-2016-15021 names the fix: "Upgrading to version v2 is able to address this issue."

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