CVE-2026-21670 Information disclosure in Backup and Replication
High 7.7
Published
Updated
Check this codebase for CVE-2026-21670 and fix it if it is affected.
What it is: CVE-2026-21670 is a high-severity 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.
Exploitation: There is no known exploitation of CVE-2026-21670 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-2026-21670/ (Markdown: https://insights.sbomify.com/CVE-2026-21670/index.md)
A low-privileged user can extract saved SSH credentials from Veeam Backup and Replication, potentially leading to unauthorized access.
- 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-2026-21670?
CVE-2026-21670 is a high-severity 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 low-privileged user to extract saved SSH credentials.
Weakness: CWE-522
Which versions are affected by CVE-2026-21670?
It affects 1 product.
Products include Veeam Veeam Backup \& Replication.
How do I fix CVE-2026-21670?
No fix has been published for CVE-2026-21670 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21670 being exploited?
There is no known exploitation of CVE-2026-21670 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-qmvm-ccq4-rpc7.