CVE-2023-1586: avast antivirus
CVSS: 6.5v3.1MediumModified
Published 19-04-2023Last modified 05-02-2025
Vulnerability summary
CVE-2023-1586 is a medium (CVSS 6.5) vulnerability in avast antivirus. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.6% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 19-04-2023PublishedVulnerability first disclosed.
- 05-02-2025Last modifiedVulnerability information updated.
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
CVSS metrics
2 scores · 2 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:LSources2 sources · 4.7–6.5
- NVDNIST4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:NDiffers
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
11%
Versus all other CVEs
30-day change
0.00 pp
From 0.21% on 20-09-2026
20-09-202620-10-2026
EPSS score0.21%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Avast2 products
- antivirus≥ 22.5, < 22.11
- avast_antivirus≥ 22.5, ≤ 22.10
Avg2 products
- anti-virus≥ 22.5, < 22.11
- avg_antivirus≥ 22.5, ≤ 22.10
2 vendors · 4 products
References
1 links- support.norton.com/sp/static/external/tools/security-advisories.htmlThird Party Advisory