CVE-2026-21708 SQL injection in Backup and Replication
A SQL injection vulnerability allows a Backup Viewer to execute remote code as the postgres user in Veeam Backup and Replication.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21708?
CVE-2026-21708 is a critical SQL injection vulnerability in Veeam Backup and Replication, published on 12 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability allowing a Backup Viewer to perform remote code execution (RCE) as the postgres user.
Weakness: CWE-89
Which versions are affected by CVE-2026-21708?
It affects 1 product.
Products include Veeam Veeam Backup \& Replication.
How do I fix CVE-2026-21708?
No fix has been published for CVE-2026-21708 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-21708 being exploited?
There is no known exploitation of CVE-2026-21708 in the wild and no public exploit code.
Other vulnerabilities in Veeam Backup and Replication
- CVE-2024-40711 Veeam Backup and Replication Deserialization
- CVE-2022-26501 Veeam Backup & Replication Remote Code Execution
- CVE-2022-26500 Veeam Backup & Replication Remote Code Execution
- CVE-2023-27532 Veeam Backup & Replication Cloud Connect Missing Authentication for Critical Function
- CVE-2026-21666 Missing authorization in Backup and Replication
Sources
Also known as GHSA-c76v-r5mr-9fpq.