CVE-2022-4173: avast Improper Privilege Management
CVSS: 8.8v3.1HighModified
Published 05-12-2022Last modified 14-04-2025
Vulnerability summary
CVE-2022-4173 is a high (CVSS 8.8) Improper Privilege Management vulnerability in avast. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 53.3% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
0.73%
0%100%
Low · +0.03 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 05-12-2022PublishedVulnerability first disclosed.
- 14-04-2025Last modifiedVulnerability information updated.
Description
A vulnerability within the malware removal functionality of Avast and AVG Antivirus allowed an attacker with write access to the filesystem, to escalate his privileges in certain scenarios. The issue was fixed with Avast and AVG Antivirus version 22.10.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSources2 sources · 7.3–8.8
- CVE.orgCNA7.3HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:HDiffers
EPSS trend
Probability
0.73%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
+0.03 pp
From 0.70% on 20-09-2026
20-09-202620-10-2026
EPSS score0.73%
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
- avast≥ 20.5, ≤ 22.9
- avg_antivirus≥ 20.5, ≤ 22.9
Nortonlifelock1 product
- avast and avg antivirus≥ 20.5, ≤ 22.9
2 vendors · 3 products
References
1 links- support.norton.com/sp/static/external/tools/security-advisories.htmlThird Party Advisory