CVE-2016-10034

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 82.3%, top 1% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 38%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
9.8(medium)
EPSS
98.4%
KEV
Not listed

Published

December 30, 2016

Last Modified

May 6, 2026

Advisory Details (7)

Auto-updated May 9, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic
http://www.securityfocus.com/bid/95144
generic🟡 PoC Available

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

https://www.exploit-db.com/exploits/42221/
generic🟡 PoC Available

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/
generic🟡 PoC Available

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

https://www.exploit-db.com/exploits/40979/
generic

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

https://security.gentoo.org/glsa/201804-10
generic🟡 PoC Available

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
generic

Security Advisory - Security - Zend Framework

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
zendframework/zend-mail2.7.0, 2.7.12.7.2—

Data Freshness Timeline

(refreshed 7× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-12 05:42 UTCEPSS rescore
  2. 2026-07-11 08:23 UTCEPSS rescore
  3. 2026-07-09 19:05 UTCEPSS rescore
  4. 2026-07-09 19:05 UTCEPSS rescore
  5. 2026-07-08 15:10 UTCEPSS rescore
  6. 2026-07-08 11:05 UTCOSV refresh
  7. 2026-07-06 02:20 UTCEPSS rescore
  8. 2026-07-01 15:02 UTCEPSS rescore
  9. 2026-06-30 23:19 UTCEPSS rescore
  10. 2026-06-30 23:19 UTCEPSS rescore
  11. 2026-06-28 14:04 UTCEPSS rescore
  12. 2026-06-28 04:53 UTCEPSS rescore
  13. 2026-06-27 03:05 UTCEPSS rescore
  14. 2026-06-25 13:47 UTCEPSS rescore
  15. 2026-06-25 13:47 UTCEPSS rescore
  16. 2026-06-24 14:02 UTCEPSS rescore
  17. 2026-06-24 14:02 UTCEPSS rescore
  18. 2026-06-23 21:30 UTCEPSS rescore
  19. 2026-06-22 14:23 UTCEPSS rescore
  20. 2026-06-22 14:23 UTCEPSS rescore
  21. 2026-06-21 01:57 UTCEPSS rescore
  22. 2026-06-21 01:57 UTCEPSS rescore
  23. 2026-06-19 23:06 UTCOSV refresh
  24. 2026-06-19 19:23 UTCEPSS rescore
  25. 2026-06-19 19:23 UTCEPSS rescore
Show 37 more
  1. 2026-06-18 17:50 UTCEPSS rescore
  2. 2026-06-17 17:50 UTCEPSS rescore
  3. 2026-06-17 17:49 UTCEPSS rescore
  4. 2026-06-16 17:50 UTCEPSS rescore
  5. 2026-06-16 17:50 UTCEPSS rescore
  6. 2026-06-15 17:45 UTCEPSS rescore
  7. 2026-06-12 23:09 UTCEPSS rescore
  8. 2026-06-12 23:09 UTCEPSS rescore
  9. 2026-06-10 22:15 UTCEPSS rescore
  10. 2026-06-08 14:14 UTCEPSS rescore
  11. 2026-06-05 22:44 UTCEPSS rescore
  12. 2026-06-05 06:08 UTCEPSS rescore
  13. 2026-06-05 06:08 UTCEPSS rescore
  14. 2026-06-04 13:10 UTCEPSS rescore
  15. 2026-06-04 13:10 UTCEPSS rescore
  16. 2026-06-02 20:10 UTCEPSS rescore
  17. 2026-05-31 01:55 UTCOSV refresh
  18. 2026-05-31 00:14 UTCEPSS rescore
  19. 2026-05-27 13:38 UTCEPSS rescore
  20. 2026-05-27 13:38 UTCEPSS rescore
  21. 2026-05-23 00:10 UTCEG score recompute
  22. 2026-05-22 21:15 UTCEPSS rescore
  23. 2026-05-21 22:40 UTCEPSS rescore
  24. 2026-05-20 22:37 UTCEPSS rescore
  25. 2026-05-20 22:37 UTCEPSS rescore
  26. 2026-05-20 10:23 UTCEG score recompute
  27. 2026-05-20 06:46 UTCEG score recompute
  28. 2026-05-20 03:08 UTCEG score recompute
  29. 2026-05-19 23:31 UTCEG score recompute
  30. 2026-05-19 19:54 UTCEG score recompute
  31. 2026-05-19 16:12 UTCEG score recompute
  32. 2026-05-19 12:08 UTCEG score recompute
  33. 2026-05-19 08:10 UTCEG score recompute
  34. 2026-05-19 04:32 UTCEG score recompute
  35. 2026-05-19 00:54 UTCEG score recompute
  36. 2026-05-18 21:30 UTCEPSS rescore
  37. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-42221
    First seen Jun 21, 2017

    PHPMailer < 5.2.20 with Exim MTA - Remote Code Execution

    Open source ↗
  • Exploit-DBEDB-40986
    First seen 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
    First seen 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 vulnerability 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 disclosed?
CVE-2016-10034 was first published in the National Vulnerability Database on December 30, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-10034 actively exploited?
CVE-2016-10034 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-10034, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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