CVE-2026-21672 Privilege escalation in Backup and Replication
High 8.8
Published
Updated
Check this codebase for CVE-2026-21672 and fix it if it is affected.
What it is: CVE-2026-21672 is a high-severity vulnerability in Veeam Backup and Replication, published on 12 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-21672 in the wild and no public exploit code.
Affected product: Veeam Backup and Replication. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-21672/ (Markdown: https://insights.sbomify.com/CVE-2026-21672/index.md)
Local attackers can escalate privileges on Windows-based Veeam Backup & Replication servers, requiring immediate patching by administrators.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21672?
CVE-2026-21672 is a high-severity vulnerability in Veeam Backup and Replication, published on 12 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability allowing local privilege escalation on Windows-based Veeam Backup & Replication servers.
Weakness: CWE-538
Which versions are affected by CVE-2026-21672?
How do I fix CVE-2026-21672?
No fix has been published for CVE-2026-21672 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21672 being exploited?
There is no known exploitation of CVE-2026-21672 in the wild and no public exploit code.
Sources
Also known as GHSA-h68h-qcxp-qv6v.