Avast and AVG Antivirus for Windows vulnerable to Privilege Escalation
Priority LOW 39CWE-269Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-269.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00726 54th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NortonLifeLock | Avast and AVG Antivirus | 20.5 – 22.9 | — | No fix listed | CNA |
- Avast and AVG Antivirus VendorNortonLifeLock Affected 20.5 – 22.9 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-4173
- 2026-10-03 Alias added: GHSA-33r9-qfg8-468w
References
More Avast vulnerabilities
- TI-2016-03387 Avast allows remote attackers to cause a denial of service (memory corruption) and… CVSS 3.0HIGH 7.8
Sources
- CVE-2022-4173 · CVE Program
- CVE-2022-4173 · NVD
- FIRST EPSS
- GHSA-33r9-qfg8-468w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences