CVE-2026-80302: Gen Digital Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimate · Unrestricted File Upload
Affects Gen Digital Avast Antivirus, Avast One, Avast Premium Security, Avast UltimateSource CVE Database V5
Not known to be exploited.
Data as of 6 Nov 2026, 16:20 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 6 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Gen DigitalAvast Antivirus, Avast One, Avast Premium Security, Avast Ultimate | Affected
| Fixed in– |
| Gen DigitalAVG Antivirus Free, AVG Internet Security, AVG Ultimate | Affected
| Fixed in– |
| Gen DigitalNorton Antivirus Plus, Norton 360 Standard, Norton 360 Deluxe, Norton 360 Advanced | Affected
| Fixed in– |
AI-suggested
Until a fix is available, restrict local access to trusted users and monitor for updates from Gen Digital regarding this vulnerability.
Description
A vulnerability in Avast Antivirus and related products allows a local attacker running inside the Avast sandbox on Windows to write files outside the sandbox containment. This occurs due to improper validation in the sandbox's file virtualization layer, enabling arbitrary file writes to protected system locations. Exploitation can lead to overwriting executables or system libraries, resulting in code execution with host privileges after system operations or reboot.
References
- gendigital.com/us/en/contact-us/security-advisories/ (opens in a new tab)
- support.avast.com/en-us/article/Update-Antivirus (opens in a new tab)
- support.avg.com/SupportArticleView?l=en&urlname=Update-AVG-Antivirus (opens in a new tab)
- support.norton.com/sp/en/us/home/current/solutions/v20240108175512167 (opens in a new tab)