CVE-2023-1586 | BDVDB-2026-200573 Detail

AvastAvast Antivirus

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

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact low. Attack vector: local.

Weaknesses#

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

References#

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

Exploit#

No public exploit known

History#

Version 12023-04-19Record published in the CVE List.
Version 22025-02-05Most recent update recorded in the CVE List.

Published

Published: 2023-04-19
Last modified: 2025-02-05

Vendor information

Vendor: Avast
Product: Avast Antivirus

All Avast vulnerabilities

Score

6.5 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 11.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Race Condition

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 22.5 and <= 22.10
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

6.5 Medium

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

Metric breakdown
Attack Vector	Local
Attack Complexity	High
Privileges Required	Low
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).