Adobe Prelude M4A File Parsing Memory Corruption Arbitrary Code Execution

published 2021-11-22 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27935

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

Adobe Prelude version 10.1 (and earlier) is affected by a memory corruption vulnerability due to insecure handling of a malicious M4A file, potentially resulting in arbitrary code execution in the context of the current user. User interaction is required in that the victim must open a specially crafted file to exploit this vulnerability.

Patch / fix

links 1

helpx.adobe.com/security/products/prelude/apsb21-96.html advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 18 mo ago (2025-04-23)

Exploit prediction

1.73% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

Adobe Prelude

Classification

Weakness

CWE-788 Access of Memory Location After End of Buffer
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

helpx.adobe.com /security/products/prelude/apsb21-96.html
patch, vendor-advisory

Sources

CVE List CVE-2021-40770
NVD CVE-2021-40770

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary