CVE-2016-10034

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

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

Also known asEUVD-2022-5138 (ENISA EUVD) · GHSA-r9mw-gwx9-v3h5 (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 38%CVSS: 9.8Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

The setFrom function in the Sendmail adapter in the zend-mail component before 2.4.11, 2.5.x, 2.6.x, and 2.7.x before 2.7.2, and Zend Framework before 2.4.11 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double quote) in a crafted e-mail address.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

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.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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 available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
38%
EPSS %ILE
98th
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
38% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). 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 low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 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 low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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)14 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's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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

December 30, 2016

Last Modified

June 17, 2026

Advisory Details (8)

Auto-updated Oct 7, 2026
Patch available.
Web page

CVE-2016-10034 - PSIRT.COM

http://www.securityfocus.com/bid/95144
Web page

PHPMailer < 5.2.20 with Exim MTA - Remote Code Execution - PHP webapps Exploit

https://www.exploit-db.com/exploits/42221/
Web page

PHPMailer < 5.2.20 / SwiftMailer < 5.4.5-DEV / Zend Framework / zend-mail < 2.4.11 - 'AIO' 'PwnScriptum' Remote Code Execution - PHP webapps Exploit

https://www.exploit-db.com/exploits/40986/
Web page

Zend Framework / zend-mail < 2.4.11 - Remote Code Execution - PHP webapps Exploit

https://www.exploit-db.com/exploits/40979/
Web page

Zend Framework: Multiple vulnerabilities (GLSA 201804-10) — Gentoo security

https://security.gentoo.org/glsa/201804-10
Web page

ZendFramework-Exploit-ZendMail-Remote-Code-Exec-CVE-2016-10034-Vuln

https://legalhackers.com/advisories/ZendFramework-Exploit-ZendMail-Remote-Code-Exec-CVE-2016-10034-Vuln.html
Web page

Security Advisory - Security - Zend Framework

https://framework.zend.com/security/advisory/ZF2016-04

Vendor Advisories for CVE-2016-10034(1)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
composerzendframework/zend-mail @ 2.4.11 (fixes < 2.4.11)—ghsa
composerzendframework/zend-mail @ 2.7.2 (fixes >= 2.7, < 2.7.2)—ghsa
composerzendframework/zend-mail—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
zendframework/zend-mail2.7.0, 2.7.1
  • every version up to 2.4.11: fixed in 2.4.11
  • 2.5 through 2.5.2: no fix on record
  • 2.6 through 2.6.2: no fix on record
  • 2.7 up to 2.7.2: fixed in 2.7.2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 43× 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 197 rows on record for this CVE, as 98 entries (2 repeats merged).

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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 97 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  2. 2026-11-12 16:17 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-11 17:47 UTCEchelonGraph re-scored
  4. 2026-11-11 17:47 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-11-11 16:28 UTCEPSS rescoreEPSS 38% · 98th percentile
  6. 2026-11-10 19:23 UTCEchelonGraph re-scored
  7. 2026-11-10 19:23 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-11-10 16:30 UTCEPSS rescoreEPSS 38% · 98th percentile
  9. 2026-11-09 20:55 UTCEchelonGraph re-scored
  10. 2026-11-09 20:55 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-11-09 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  12. 2026-11-08 22:33 UTCEchelonGraph re-scored
  13. 2026-11-08 22:33 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-11-08 16:29 UTCEPSS rescoreEPSS 38% · 98th percentile
  15. 2026-11-08 00:10 UTCEchelonGraph re-scored
  16. 2026-11-08 00:10 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-11-07 16:29 UTCEPSS rescoreEPSS 38% · 98th percentile
  18. 2026-11-07 01:46 UTCEchelonGraph re-scored
  19. 2026-11-07 01:46 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-11-06 16:28 UTCEPSS rescoreEPSS 38% · 98th percentile
  21. 2026-11-06 03:24 UTCEchelonGraph re-scored
  22. 2026-11-06 03:24 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-11-05 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  24. 2026-11-05 05:01 UTCEchelonGraph re-scored
  25. 2026-11-05 05:01 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
Show 73 more
  1. 2026-11-04 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  2. 2026-11-04 06:38 UTCEchelonGraph re-scored
  3. 2026-11-04 06:38 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-11-03 16:32 UTCEPSS rescoreEPSS 38% · 98th percentile
  5. 2026-11-03 08:15 UTCEchelonGraph re-scored
  6. 2026-11-03 08:14 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-11-02 16:33 UTCEPSS rescoreEPSS 38% · 98th percentile
  8. 2026-11-02 09:52 UTCEchelonGraph re-scored
  9. 2026-11-02 09:52 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-11-02 09:25 UTCOSV refresh
  11. 2026-11-01 11:29 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-11-01 08:48 UTCGHSA enrichmentGHSA-r9mw-gwx9-v3h5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-11-01 08:48 UTCEchelonGraph re-scored
  14. 2026-10-31 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  15. 2026-10-31 13:06 UTCEchelonGraph re-scored
  16. 2026-10-30 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  17. 2026-10-30 14:40 UTCEchelonGraph re-scored
  18. 2026-10-29 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  19. 2026-10-28 17:55 UTCEchelonGraph re-scored
  20. 2026-10-28 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  21. 2026-10-27 19:30 UTCEchelonGraph re-scored
  22. 2026-10-27 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  23. 2026-10-26 21:07 UTCEchelonGraph re-scored
  24. 2026-10-26 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  25. 2026-10-25 19:50 UTCEchelonGraph re-scored
  26. 2026-10-25 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  27. 2026-10-24 22:16 UTCEchelonGraph re-scored
  28. 2026-10-24 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  29. 2026-10-23 23:53 UTCEchelonGraph re-scored
  30. 2026-10-23 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  31. 2026-10-23 01:29 UTCEchelonGraph re-scored
  32. 2026-10-22 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  33. 2026-10-22 02:39 UTCEchelonGraph re-scored
  34. 2026-10-21 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  35. 2026-10-21 04:13 UTCEchelonGraph re-scored
  36. 2026-10-20 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  37. 2026-10-20 05:50 UTCEchelonGraph re-scored
  38. 2026-10-19 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  39. 2026-10-19 07:25 UTCEchelonGraph re-scored
  40. 2026-10-18 08:59 UTCEchelonGraph re-scored
  41. 2026-10-17 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  42. 2026-10-17 10:34 UTCEchelonGraph re-scored
  43. 2026-10-16 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  44. 2026-10-16 12:08 UTCEchelonGraph re-scored
  45. 2026-10-15 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  46. 2026-10-15 13:33 UTCEchelonGraph re-scored
  47. 2026-10-14 16:27 UTCEPSS rescoreEPSS 38% · 98th percentile
  48. 2026-10-14 08:34 UTCEchelonGraph re-scored
  49. 2026-10-13 16:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  50. 2026-10-12 20:46 UTCEchelonGraph re-scored
  51. 2026-10-12 01:10 UTCEchelonGraph re-scored
  52. 2026-10-11 13:40 UTCEPSS rescoreEPSS 38% · 98th percentile
  53. 2026-10-10 19:54 UTCEPSS rescoreEPSS 38% · 98th percentile
  54. 2026-10-09 20:01 UTCEPSS rescoreEPSS 38% · 98th percentile
  55. 2026-10-08 16:35 UTCEPSS rescoreEPSS 38% · 98th percentile
  56. 2026-10-07 23:40 UTCEPSS rescoreEPSS 38% · 98th percentile
  57. 2026-10-06 15:11 UTCEPSS rescoreEPSS 38% · 98th percentile
  58. 2026-10-05 17:38 UTCEPSS rescoreEPSS 38% · 98th percentile
  59. 2026-10-04 12:48 UTCOSV refresh
  60. 2026-10-03 14:21 UTCEPSS rescoreEPSS 38% · 98th percentile
  61. 2026-09-30 14:58 UTCEPSS rescoreEPSS 38% · 98th percentile
  62. 2026-09-30 09:09 UTCEchelonGraph re-scored
  63. 2026-09-26 15:53 UTCEPSS rescoreEPSS 38% · 98th percentile
  64. 2026-09-23 13:41 UTCEPSS rescoreEPSS 38% · 98th percentile
  65. 2026-09-19 15:35 UTCEPSS rescoreEPSS 38% · 98th percentile
  66. 2026-09-18 19:22 UTCEPSS rescoreEPSS 38% · 98th percentile
  67. 2026-09-17 19:21 UTCEPSS rescoreEPSS 38% · 98th percentile
  68. 2026-09-15 03:05 UTCEPSS rescoreEPSS 38% · 98th percentile
  69. 2026-09-15 02:44 UTCOSV refresh
  70. 2026-09-12 14:55 UTCEPSS rescoreEPSS 38% · 98th percentile
  71. 2026-09-11 09:31 UTCEPSS rescoreEPSS 38% · 98th percentile
  72. 2026-09-10 09:26 UTCEPSS rescoreEPSS 38% · 98th percentile
  73. 2026-09-06 13:42 UTCEPSS rescoreEPSS 38% · 98th percentile

Publicly available exploits

(3 references)

Public exploit code is referenced for this CVE (3 Exploit-DB entries). Defenders should treat patch urgency accordingly.

  • Exploit-DBEDB-42221
    Published Jun 21, 2017

    PHPMailer < 5.2.20 with Exim MTA - Remote Code Execution

    Open source ↗
  • Exploit-DBEDB-40986
    Published Jan 2, 2017

    PHPMailer < 5.2.20 / SwiftMailer < 5.4.5-DEV / Zend Framework / zend-mail < 2.4.11 - 'AIO' 'PwnScriptum' Remote Code Execution

    Open source ↗
  • Exploit-DBEDB-40979
    Published Dec 30, 2016

    Zend Framework / zend-mail < 2.4.11 - Remote Code Execution

    Open source ↗

Frequently asked(5)

What is CVE-2016-10034?
CVE-2016-10034 is a critical-severity vulnerability; its CVE record was published on December 30, 2016. The setFrom function in the Sendmail adapter in the zend-mail component before 2.4.11, 2.5.x, 2.6.x, and 2.7.x before 2.7.2, and Zend Framework before 2.4.11 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double…
When was CVE-2016-10034 made public?
CVE-2016-10034 was made public on December 20, 2016: that is the date its CVE record's CNA, MITRE Corporation, gives for when the vulnerability was made public. The CVE record itself was published on December 30, 2016. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2016-10034 actively exploited?
CVE-2016-10034 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38% probability of exploitation in the next 30 days (98th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-10034?
CVE-2016-10034 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-10034?
A fix for CVE-2016-10034 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2016-10034 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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