What’s Vulnerable › Vulnerabilities

CVE-2021-43759: Adobe Media Encoder MP4 File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-07-12 · updated 2026-06-17
• Weakness: CWE-125

Description

Adobe Media Encoder versions 22.0, 15.4.2 (and earlier) are affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious MP4 file.

Affected products

• Adobe Media Encoder: before 15.4.3; 22.0 — fixed in 15.4.3

How to fix

Upgrade to a fixed version: Adobe Media Encoder 15.4.3. Check the vendor advisory for mitigations.

References

• https://helpx.adobe.com/security/products/media-encoder/apsb21-118.html
• https://helpx.adobe.com/security/products/media-encoder/apsb21-118.html

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