Fortra flaws being used in attacks

CISA lists 4 flaws in Fortra products as being used in attacks, most recently on 29 Sep 2025. 2 have been used in ransomware.

What to do

1. Update every Fortra product you use.Install the updates Fortra 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 29 Sep 2025
   Fortra GoAnywhere MFT
   CVE-2025-10035Fortra GoAnywhere MFT Deserialization of Untrusted Data Vulnerability
   Fortra GoAnywhere MFT contains a deserialization of untrusted data vulnerability allows an actor with a validly forged license response signature to deserialize an arbitrary actor-controlled object, possibly leading to command injection.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
2. Being used in attacksAdded by CISA on 30 Mar 2023
   Fortra Cobalt Strike
   CVE-2022-42948Fortra Cobalt Strike User Interface Remote Code Execution Vulnerability
   Fortra Cobalt Strike User Interface contains an unspecified vulnerability rooted in Java Swing that may allow remote code execution.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD
3. Being used in attacksAdded by CISA on 30 Mar 2023
   Fortra Cobalt Strike
   CVE-2022-39197Fortra Cobalt Strike Teamserver Cross-Site Scripting (XSS) Vulnerability
   Fortra Cobalt Strike contains a cross-site scripting (XSS) vulnerability in Teamserver that would allow an attacker to set a malformed username in the Beacon configuration, allowing them to execute code remotely.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD
4. Being used in attacksUsed in ransomwareAdded by CISA on 10 Feb 2023
   Fortra GoAnywhere MFT
   CVE-2023-0669Fortra GoAnywhere MFT Remote Code Execution Vulnerability
   Fortra (formerly, HelpSystems) GoAnywhere MFT contains a pre-authentication remote code execution vulnerability in the License Response Servlet due to deserializing an attacker-controlled object.
   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. Fortra on CISA’s site.