CVE-2026-65641 Auth bypass in One
Unauthenticated attackers can coerce SMB authentication from the service account, potentially leading to privilege escalation and code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-65641?
CVE-2026-65641 is a critical authentication bypass vulnerability in Veeam One, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability allowing an unauthenticated network attacker to coerce SMB authentication from the service account.
Weakness: CWE-288
Which versions are affected by CVE-2026-65641?
How do I fix CVE-2026-65641?
No fix has been published for CVE-2026-65641 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-65641 being exploited?
There is no known exploitation of CVE-2026-65641 in the wild and no public exploit code.
Sources
Also known as GHSA-mffw-5w3v-pm66.