PT-2026-138080
CVE-2026-12067
·
Published
2026-11-06
·
Updated
2026-11-06
Description by
Score
N/A
Not availableNo severity ratings or metrics are available. When they are, we'll update the corresponding info on the page.
Missing exception handlers in AvastSvc native message dispatcher (ashServ.dll) on Windows allow a local, unprivileged attacker to crash the service by sending specially crafted JSON messages.
The vulnerability spans multiple handler pathways in the RPC-based native message protocol:
- Log NmSvc.message handler: converts JSON fields to strings without type validation and without exception boundaries.
- OpenInSz NmSvc handler: converts URL and origin fields to strings without type checking, exposing an exception.
- OpenInSz NmSvc.profile handler: converts the profile field to an integer without validation.
In all three cases, the exceptions are not caught by action-specific handlers and propagate up the dispatcher. The common root cause is the absence of try-catch blocks around JSON type conversions in the native message processing chain.
Found an issue in the description? Have something to add? Feel free to write us 👾