Out of Bounds write on scan of malformed eml file may crash the application

published 2024-10-04 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-49969

cvss: 5.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits: 0; none known

An out-of-bounds write in the engine module in AVG/Avast Antivirus signature <24092400 released on 24/Sep/2024 on MacOS allows a malformed eml file to crash the application during file processing.

Patch / fix

fixed in 1

AVG/Avast Antivirus < 24092400

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-10-04)

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.1	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

AVG/Avast Antivirus

Classification

Weakness

CWE-787 Out-of-bounds Write

References

support.norton.com /sp/static/external/tools/security-advisories.html
not-applicable

Sources

CVE List CVE-2024-9481
NVD CVE-2024-9481

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Summary