What’s Vulnerable › Vulnerabilities

CVE-2021-21859

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-16 · updated 2026-06-17
• Weakness: CWE-680

Description

An exploitable integer truncation vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. The stri_box_read function is used when processing atoms using the 'stri' FOURCC code. An attacker can convince a user to open a video to trigger this vulnerability.

Affected products

• Debian Linux: 11.0
• GPAC: 1.0.1

References

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1298
• https://www.debian.org/security/2021/dsa-4966
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1298
• https://www.debian.org/security/2021/dsa-4966

Get alerted when CVE-2021-21859 or the next vulnerability affects your stack