AvastSvc native message dispatcher (ashServ.dll) · Missing Exception Handlers
Source GCVE Database
Not known to be exploited.
Data as of 6 Nov 2026, 19:20 UTC
Rated Medium 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, Avast Business Security | 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, restricting local access to the service and monitoring for abnormal service crashes may help mitigate impact.
Description
CVE-2026-12067 is a vulnerability in AvastSvc native message dispatcher (ashServ.dll) on Windows where missing exception handlers allow a local, unprivileged attacker to crash the service by sending specially crafted JSON messages. The flaw affects multiple RPC-based native message handlers that convert JSON fields without proper type validation or exception handling, causing unhandled exceptions to propagate and crash the service.
References
- nvd.nist.gov/vuln/detail/CVE-2026-12067 (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)
- gendigital.com/us/en/contact-us/security-advisories (opens in a new tab)