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Fencer Vulns
high 7.1

CVE-2021-25801 json

A buffer overflow vulnerability in the __Parse_indx component of VideoLAN VLC Media Player 3.0.11 allows attackers to cause an out-of-bound…

published 2021-07-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-12684

cvss
7.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

A buffer overflow vulnerability in the __Parse_indx component of VideoLAN VLC Media Player 3.0.11 allows attackers to cause an out-of-bounds read via a crafted .avi file.

Patch / fix

  • vlc Debian 14, Debian 13, Debian 12 3.0.12-1

debian advisories DEBIAN-CVE-2021-25801

  • vlc Ubuntu Pro 16.04 LTS 2.2.2-5ubuntu0.16.04.5+esm2
  • vlc Ubuntu Pro 18.04 LTS 3.0.8-0ubuntu18.04.1+esm1
  • vlc Ubuntu Pro 20.04 LTS 3.0.9.2-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2021-25801

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

1.52% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.