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CVE-2016-10034

64
FAUCET Score

CVE-2016-10034 is a critical remote code execution vulnerability affecting the zend-mail component (versions 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). It allows attackers to inject extra parameters into the mail command via a crafted email address using a backslash double quote, leading to arbitrary code execution. With a CVSS score of 9.8, this vulnerability is highly severe, requiring no user interaction or authentication, and can result in complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, multiple public exploits exist on ExploitDB, indicating its exploitability, though it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.4.10CPE matchmatch criteria
cpe:2.3:a:zend:zend_framework:*:*:*:*:*:*:*:*
<= 2.4.10CPE matchmatch criteria
cpe:2.3:a:zend:zend-mail:*:*:*:*:*:*:*:*
2.5.0CPE matchmatch criteria
cpe:2.3:a:zend:zend-mail:2.5.0:*:*:*:*:*:*:*
2.5.1CPE matchmatch criteria
cpe:2.3:a:zend:zend-mail:2.5.1:*:*:*:*:*:*:*
2.5.2CPE matchmatch criteria
cpe:2.3:a:zend:zend-mail:2.5.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
38.44%
Probability of exploitation in next 30 days
EPSS Percentile
98.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-42221 · Jun 21, 2017
This CVE's current EPSS score of 0.3844 is in the 96th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: zendframework/zend-mailFixed in: 2.4.11
composerpatch availablevia ghsa
Product: zendframework/zend-mailFixed in: 2.7.2

Vendor Advisories (1)

composerGHSA-r9mw-gwx9-v3h5critical

zend-mail remote code execution via Sendmail adapter

May 14, 2022

References

framework.zend.com / security/advisory/ZF2016-04
ExploitTechnical DescriptionVendor Advisory
legalhackers.com / advisories/ZendFramework-Exploit-ZendMail-Remote-Code-Exec-CVE-2016-10034-Vuln.html
ExploitTechnical DescriptionThird Party Advisory
security.gentoo.org / glsa/201804-10
exploit-db.com / exploits/40979
exploit-db.com / exploits/40986
exploit-db.com / exploits/42221
securityfocus.com / bid/95144
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037539