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TI-2021-21513 Aliases CVE-2021-46818GHSA-2fx2-jv5q-q4m6

Adobe Media Encoder M4A file memory corruption vulnerability could lead to remote code execution

Priority MEDIUM 40CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Adobe Media Encoder version 15.4 (and earlier) are affected by a memory corruption vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious M4A file.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02114 81st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AdobeMedia Encoderup to 15.4; up to None—No fix listedCNA
  • Media Encoder VendorAdobe Affected up to 15.4; up to None Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:adobe:media_encoder:*:*:*:*:*:*:*:*before 15.4.1VulnerableAdobe
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:adobe:media_encoder:*:*:*:*:*:*:*:* Versions before 15.4.1 Vulnerable ·Adobe
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-46818
  2. 2026-10-03 Alias added: GHSA-2fx2-jv5q-q4m6

References

Advisory 1

  • TI-2019-05918 Out-of-bounds write in Adobe Media Encoder CVSS 3.1CRITICAL 9.8
  • TI-2019-05549 Use after free in Adobe Media Encoder CVSS 3.0HIGH 8.8
  • TI-2021-14520 Adobe Media Encoder Improper Memory Access When Parsing SVG Files Could Lead To Remote Code Execution CVSS 3.1HIGH 7.8
  • TI-2021-14465 Adobe Media Encoder Memory Corruption Could Lead To Remote Code Execution CVSS 3.1HIGH 7.8
  • TI-2020-03279 Out-of-bounds write in Adobe Media Encoder CVSS 3.1HIGH 7.8
  • TI-2019-05551 Out-of-bounds read in Adobe Media Encoder CVSS 3.0MEDIUM 6.5
See all 64 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences