Path traversal in Exim - #VU139245
Published: July 23, 2026
Vulnerability identifier: #VU139245
CSH Severity: Low
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-22
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to path traversal in command-line queue-name handling when processing command-line arguments intended for transferring queue-name through an Exim execution chain. A local user can supply crafted command-line arguments to escalate privileges.
To reach the vulnerable code, command-line access on the system is required.
Affected software
Exim
Ubuntu
exim4 (Ubuntu package)
Ubuntu
exim4 (Ubuntu package)
Remediation
Install security update from vendor's website.
Exim - update to 4.99.5
exim4 (Ubuntu package) - addressed in versions 4.95-4ubuntu2.11, 4.97-4ubuntu4.7, 4.99.1-1ubuntu1.4
exim4 (Ubuntu package) - addressed in versions 4.95-4ubuntu2.11, 4.97-4ubuntu4.7, 4.99.1-1ubuntu1.4