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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sat, 21 Mar 2026 05:30:00 +0000

Type Values Removed Values Added
References

Mon, 16 Mar 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared At&t Bell Labs
At&t Bell Labs unix
Vendors & Products At&t Bell Labs
At&t Bell Labs unix

Fri, 13 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 13 Mar 2026 19:15:00 +0000

Type Values Removed Values Added
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. 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.

Fri, 13 Mar 2026 18:45:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-03-21T01:33:36.533Z

Reserved: 2026-03-13T18:38:07.187Z

Link: CVE-2025-71263

cve-icon Vulnrichment

Updated: 2026-03-21T01:33:36.533Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-13T19:53:53.983

Modified: 2026-03-21T02:16:18.103

Link: CVE-2025-71263

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-16T09:24:34Z

Weaknesses