What is CVE-2021-25802?

CVE-2021-25802 is a high-severity vulnerability in Videolan Vlc Media Player, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2021-07-26.

How severe is CVE-2021-25802?

High severity. CVSS v3 base score is 7.1 out of 10.

Out-of-bounds Read in Videolan Vlc Media Player

CVE-2021-25802

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

Vulnerability class: Buffer Overflow

Published 2021-07-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Videolan Vlc Media Player — versions 3.0.11

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

code.videolan.org/videolan/vlc-3.0/-/commit/0660acc3ab64d2c3ad99cae887a438f0648… (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-25802?: CVE-2021-25802 is a high-severity vulnerability in Videolan Vlc Media Player, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2021-07-26.
How severe is CVE-2021-25802?: High severity. CVSS v3 base score is 7.1 out of 10.