Main Vulnerability Database Vulnerabilities #VU104137

SQL injection in Exim - CVE-2025-26794

Published: February 21, 2025 / Updated: October 31, 2025

Vulnerability identifier: #VU104137

CSH Severity: Medium

CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-26794

CWE-ID: CWE-89

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary SQL queries in application's database.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can send a specially crafted email to the affected server and execute arbitrary SQL commands within the application's database.

Note, the vulnerability exists only when the build time option _USE_SQLITE_ was set (it enables the use of SQLite for the hints databases), runtime config enables ETRN and enforces ETRN serialization.

Affected software

Exim
Fedora
exim

How to mitigate CVE-2025-26794

Install updates from vendor's website.

Exim - update to 4.98.1
exim - addressed in versions 4.98.1-1.el8, 4.98.1-1.el9, 4.98.1-1.fc40, 4.98.1-1.fc41, 4.98.1-1.fc42, 4.98.2-1.fc42

Links to Public Exploits and PoC-codes

Exploit #12063 - CVE-2025-26794-exploit (SQL injection exploit for CVE-2025-26794 in Exim 4.98. Automated data extraction via time-based blind SQLi. For authorized penetration testing only.) (October 31, 2025)

External References

https://www.exim.org/static/doc/security/CVE-2025-26794.txt