CVE-2021-30123

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

3.40% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 87.8% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-04-07 19:16Z5 YR AGO

Last updated

2024-08-03 22:24Z2 YR AGO

Reserved

2021-04-02

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.1

Document digest

cf39ace6aee4c14a719512a2f511b5c9fdaf09ce0280e9503e9686ecfe2a61cc

• trac.ffmpeg.orghttps://trac.ffmpeg.org/ticket/8845x_refsource_MISC
• git.videolan.orghttp://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=d6f293353c94c7ce200f6e0975ae3de49787f91fx_refsource_MISC
• trac.ffmpeg.orghttps://trac.ffmpeg.org/ticket/8863x_refsource_MISC
• security.gentoo.orgGLSA-202105-24https://security.gentoo.org/glsa/202105-24vendor-advisoryx_refsource_GENTOO