Vulnerability · Published Aug 26, 2026 · Assigned by hackerone

CVE-2026-65641

Critical 9.3

In plain English

A critical-severity authentication bypass in One from Veeam. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)0.5%top 54.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability allowing an unauthenticated network attacker to coerce SMB authentication from the service account.

Affected products (as reported)

Vendor	Product	Versions
Veeam	One	0 – before 13.10 – before 13.0.2

Weakness: CWE-288 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:L

References

https://www.veeam.com/kb4905