CVE-2026-15681 in AnyDesk
AnyDesk Screen Recording Link Following Denial-of-Service Vulnerability. This vulnerability allows local attackers to create a denial-of-service condition on affected installations of AnyDesk. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of screen recording files. By creating a junction, an attacker can abuse the service to create arbitrary files. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-26591.
Quick answer
AnyDesk should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- AnyDesk 9.0.4
Fixed versions
- Latest vendor-supported patched release when available; verify against ZDI-26-400 and the vendor release notes
How to fix it
CVE-2026-15681 affects AnyDesk. In simple terms, an attacker may be able to abuse the affected system if it is exposed. Update to the latest vendor-supported patched release when available. If you cannot update right away, limit access until the fix is installed.
- Find every place where AnyDesk is installed or used.
- Check the installed version against the affected versions on this page.
- Update to the latest vendor-supported patched release when available.
- If an update is not possible today, block public access or restrict it to trusted users only.
- Review recent logs for strange access, failed logins, changed files, or unexpected admin actions.
- Rotate passwords, API keys, and tokens if you think the system may have been abused.
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Verify the fix
- Confirm AnyDesk now runs a fixed version or has the vendor mitigation in place.
- Open the affected feature again and make sure normal users can still work.
- Check that public access is blocked where it should be blocked.
- Review logs again after the fix and confirm the same suspicious activity does not continue.
- Run a new Fixnx scan or your normal security check and save the result.
Related categories
Trusted references
FAQ
What is affected by CVE-2026-15681?
AnyDesk versions listed as affected should be reviewed: AnyDesk 9.0.4.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.