How severe is CVE-2016-10034?

CVE-2016-10034 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-10034 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 38% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-10034?

CVE-2016-10034 primarily affects Zend Zend Framework. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-10034?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2016-10034 published?

CVE-2016-10034 was published on 2016-12-30 and last updated on 2026-06-17.

CVE-2016-10034

CVE-2016-10034 is a critical-severity vulnerability in Zend Zend Framework with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 38% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-77.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 38% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Zend Zend Framework
Published: 2016-12-30
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2016-10034?: 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.
How severe is CVE-2016-10034?: CVE-2016-10034 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-10034 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 38% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-10034?: CVE-2016-10034 primarily affects Zend Zend Framework. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-10034?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-10034 published?: CVE-2016-10034 was published on 2016-12-30 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:a:zend:zend_framework:*:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend-mail:*:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend-mail:2.5.0:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend-mail:2.5.1:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend-mail:2.5.2:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend-mail:2.6.0:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend-mail:2.6.1:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend-mail:2.6.2:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend-mail:2.7.0:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend-mail:2.7.1:*:*:*:*:*:*:*

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