Is CVE-2025-71263 actively exploited?

No active exploitation of CVE-2025-71263 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-71263 be exploited remotely?

No. CVE-2025-71263 requires local access to exploit.

What is the CVSS score of CVE-2025-71263?

CVE-2025-71263 has a CVSS score of 7.4 (HIGH).

HOME VULNERABILITIESCVE-2025-71263

HIGH

CVE-2025-71263

CWE-120Published: March 13, 2026· Updated: Mar 16, 2026

7.4

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.6th

Official 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.

NVD Source

Technical Analysis

CVE-2025-71263 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.4.