CVE-2023-1586

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-19 · updated 2026-06-17
Weakness: CWE-367

Description

Avast and AVG Antivirus for Windows were susceptible to a Time-of-check/Time-of-use (TOCTOU) vulnerability in the restore process leading to arbitrary file creation. The issue was fixed with Avast and AVG Antivirus version 22.11

Affected products

Avast Antivirus: from 22.5 before 22.11 — fixed in 22.11
AVG Anti-Virus: from 22.5 before 22.11 — fixed in 22.11

How to fix

Upgrade to a fixed version: Avast Antivirus 22.11; AVG Anti-Virus 22.11. Check the vendor advisory for mitigations.

References

https://support.norton.com/sp/static/external/tools/security-advisories.html
https://support.norton.com/sp/static/external/tools/security-advisories.html

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