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Vulnerability record · CVE-2014-2957 · published 4 September 2014

CVE-2014-2957: Exim improper input validation vulnerability

Exim · Exim

The dmarc_process function in dmarc.c in Exim before 4.82.1, when EXPERIMENTAL_DMARC is enabled, allows remote attackers to execute arbitrary code via the From header in an email, which is passed to the expand_string function.

6.8 CVSS 2.0 Medium EPSS 5.3% · top 7.7% CWE-20 · Improper input validation
6.8CVSS 2.0 base score
5.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

The dmarc_process function in dmarc.c in Exim before 4.82.1, when EXPERIMENTAL_DMARC is enabled, allows remote attackers to execute arbitrary code via the From header in an email, which is passed to the expand_string function.

AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.exim.org/exim.git/commitdiff/5b7a7c051c9ab9ee7c924a611f90ef2be03e0ad0
http://www.openwall.com/lists/oss-security/2021/05/04/7
https://lists.exim.org/lurker/message/20140528.122536.a31d60a4.en.html PatchVendor Advisory
http://git.exim.org/exim.git/commitdiff/5b7a7c051c9ab9ee7c924a611f90ef2be03e0ad0
http://www.openwall.com/lists/oss-security/2021/05/04/7
https://lists.exim.org/lurker/message/20140528.122536.a31d60a4.en.html PatchVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2014-2957), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.