CVE-2025-10035 Fortra GoAnywhere MFT: command or code injection
In plain words: The program treats text it receives as instructions instead of plain data. The attacker can run commands on the machine — often the whole device is taken over.
Confirmed exploited by CISA on · US federal patch deadline Oct 20, 2025
What to do
- Install Fortra's security update for GoAnywhere MFT. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Fortra GoAnywhere MFT Deserialization of Untrusted Data Vulnerability
- Product
- Fortra GoAnywhere MFT
- CISA description
- 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.
- Type of flaw
- Command or code injection (CWE-502, CWE-77)
- Confirmed exploited
- Sep 29, 2025 — known to be used in ransomware attacks
- US federal patch deadline
- Oct 20, 2025
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Answering about CVE-2025-10035 ·
Questions about CVE-2025-10035
Is CVE-2025-10035 being exploited?
Yes. CISA added CVE-2025-10035 to its Known Exploited Vulnerabilities catalog on Sep 29, 2025, which means there is reliable evidence of real-world attacks, including by ransomware groups.
How do I fix CVE-2025-10035?
Install Fortra's security update for GoAnywhere MFT. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2025-10035?
Only if you use Fortra GoAnywhere MFT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.