What is CVE-2025-71264?

CVE-2025-71264 is a low-severity vulnerability in Mumble, classified under Out-of-bounds Read. CVSS score: 3.7/10. Published 2026-03-16.

How severe is CVE-2025-71264?

Low severity. CVSS v3 base score is 3.7 out of 10.

Out-of-bounds Read in Mumble

CVE-2025-71264

Mumble before 1.6.870 is prone to an out-of-bounds array access, which may result in denial of service (client crash).

Vulnerability class: Buffer Overflow

Published 2026-03-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.003 (18.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Mumble — versions 0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/mumble-voip/mumble/commit/ff2a2332cccb267721553f09c0ded4de880622e0 (Patch)
github.com/mumble-voip/mumble/pull/7032 (Patch, Issue Tracking)
bugs.debian.org/1129178 (Mailing List)

Frequently asked questions

What is CVE-2025-71264?: CVE-2025-71264 is a low-severity vulnerability in Mumble, classified under Out-of-bounds Read. CVSS score: 3.7/10. Published 2026-03-16.
How severe is CVE-2025-71264?: Low severity. CVSS v3 base score is 3.7 out of 10.