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Exploited. On CISA's list since 2022-12-13, and used by ransomware.
CVE-2022-26501 · Veeam Backup & Replication · Published 2022-03-17
9.8 out of 10
CVSS rates it critical: about as damaging as flaws get.
4.1%
Estimated chance of exploitation in the next 30 days, higher than 90% of all scored flaws (EPSS, 2026-10-29).
Yes
CISA has seen it exploited in real attacks. For US government agencies the fix is deadline passed 1396 days ago (2023-01-03).
Apply updates per vendor instructions.
The Veeam Distribution Service in the Backup & Replication application allows unauthenticated users to access internal API functions. A remote attacker can send input to the internal API which may lead to uploading and executing of malicious code.
Veeam Backup & Replication 10.x and 11.x has Incorrect Access Control (issue 1 of 2).
From the NVD.
Explore this week’s weaknesses and all learning topics
Understand the kind of weakness behind this flaw. These resources teach the weakness, rather than reproduce this specific CVE. Follow the vendor's advice above to fix the affected product.
A sensitive function is reachable without proving who is using it.
CWE-306 · CISA KEV; NVD record: 134c704f-9b21-4f2e-91b3-4a467353bcc0; NVD record: nvd@nist.gov
Reading and practice labs · Free account for labs. Basic HTTP knowledge; some labs use Burp Suite.
CWE is a catalogue of weakness types. Labels come from the sources shown and can differ or change. Resource matches reviewed 16 October 2026.
No story in the last 14 days has mentioned it.
Exploited flaws from CISA's KEV catalogue. Chance of exploitation from EPSS by FIRST. Descriptions and scores from the NVD. This product uses the NVD API but is not endorsed or certified by the NVD.