VULNERABILITY INTELLIGENCE

CVE-2025-71263

CVSS score7.4 HIGH
EPSS probability0.19%
CISA KEVNot currently listed
Published2026-03-13
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

In UNIX Fourth Research Edition (v4), the su command is vulnerable to a buffer overflow due to the 'password' variable having a fixed size of 100 bytes. A local user can exploit this to gain root privileges. It is unlikely that UNIX v4 is running anywhere outside of a very small number of lab environments. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Weakness classification

  • cve@mitre.org: CWE-120

Primary references