Veeam flaws being used in attacks

CISA lists 4 flaws in Veeam products as being used in attacks, most recently on 17 Oct 2024. All have been used in ransomware.

What to do

1. Update every Veeam product you use.Install the updates Veeam offers, on every device, and restart when asked. Each flaw below has a fix or clear advice; that’s one of CISA’s conditions for listing it.
2. If someone looks after IT for you, send them this page.Many of these are in equipment you don’t see: routers, firewalls, servers, the office network. Ask them to confirm each one is fixed, or that you don’t use the product.
3. Check anything else in the lookup.Search any app, company or CVE. Not being on CISA’s list doesn’t mean safe: keep updating either way.

Every flaw, newest first

1. Being used in attacksUsed in ransomwareAdded by CISA on 17 Oct 2024
   Veeam Backup & Replication
   CVE-2024-40711Veeam Backup and Replication Deserialization Vulnerability
   Veeam Backup and Replication contains a deserialization vulnerability allowing an unauthenticated user to perform remote code execution.
   CISA’s required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
2. Being used in attacksUsed in ransomwareAdded by CISA on 22 Aug 2023
   Veeam Backup & Replication
   CVE-2023-27532Veeam Backup & Replication Cloud Connect Missing Authentication for Critical Function Vulnerability
   Veeam Backup & Replication Cloud Connect component contains a missing authentication for critical function vulnerability that allows an unauthenticated user operating within the backup infrastructure network perimeter to obtain encrypted credentials stored in the configuration database. This may lead to an attacker gaining access to the backup infrastructure hosts.
   CISA’s required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
3. Being used in attacksUsed in ransomwareAdded by CISA on 13 Dec 2022
   Veeam Backup & Replication
   CVE-2022-26501Veeam Backup & Replication Remote Code Execution Vulnerability
   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.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD
4. Being used in attacksUsed in ransomwareAdded by CISA on 13 Dec 2022
   Veeam Backup & Replication
   CVE-2022-26500Veeam Backup & Replication Remote Code Execution Vulnerability
   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.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD

From CISA’s Known Exploited Vulnerabilities catalog, updated 21 Oct 2026 (version 2026.10.21). CISA’s required actions are written for US government agencies. Veeam on CISA’s site.