Vulnerability · Published Mar 12, 2026 · Assigned by hackerone
CVE-2026-21671
Critical 9.1
In plain English
A critical-severity security flaw in Software Appliance from Veeam. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities).
Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)1.4%top 27.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution (RCE) in high availability (HA) deployments of Veeam Backup & Replication.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Veeam | Software Appliance | 13.0.1 – before 13.0.1 |
Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H