Security Digest · Vulnerability record · Known exploited
CVE-2025-10035: Fortra GoAnywhere MFT Deserialization of Untrusted Data Vulnerability
Exploited in the wild (CISA KEV). A deserialization vulnerability in the License Servlet of Fortra's GoAnywhere MFT allows an actor with a validly forged license response signature to deserialize an arbitrary actor-controlled object, possibly leading to command injection.
CISA KEV · added 2025-09-29 CVSS 10.0 Critical EPSS 99.8% · p100.0
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Fortra GoAnywhere MFT. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-09-29, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-10-20; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns.
- EPSS 99.8%, percentile 100.0: FIRST’s model estimates a 99.8% chance of exploitation activity in the next 30 days, higher than 100.0% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
What it is
A deserialization vulnerability in the License Servlet of Fortra's GoAnywhere MFT allows an actor with a validly forged license response signature to deserialize an arbitrary actor-controlled object, possibly leading to command injection.
CISA’s summary
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.
Weakness type: CWE-77, CWE-502.
Product: Fortra GoAnywhere MFT · Assigned by: Fortra · Published: 2025-09-18
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Fortra | GoAnywhere MFT | <= 7.8.3 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| Fortra | 3.1 | 10 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-09-29; federal due date 2025-10-20. Known ransomware use: Known.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 99.80% probability of exploitation activity in the next 30 days; percentile 100.0.
Timeline
- — CVE record published by Fortra
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (fortra.com) fortra.com
Vulnerability records
- CVE.org record CVE-2025-10035 cve.org
- NVD entry CVE-2025-10035 nvd.nist.gov
Government
All exploited Fortra vulnerabilities · Today’s Security Digest