Firewall bypass via unvalidated port forwarding
Published Mar 10, 2025 · Updated Oct 7, 2025
Improper input validation in GE Vernova UR IED devices 7.0 through 8.60 allows attackers to bypass firewall rules through port forwarding. The port-forwarding configuration accepts an unvalidated destination IP address and port, then establishes a TCP connection to that destination. Adjacent-network access requires no authentication or user interaction and enables traffic relaying into otherwise restricted network segments.
Summary
What happened
Improper input validation in GE Vernova UR IED devices 7.0 through 8.60 allows attackers to bypass firewall rules through port forwarding. The port-forwarding configuration accepts an unvalidated destination IP address and port, then establishes a TCP connection to that destination. Adjacent-network access requires no authentication or user interaction and enables traffic relaying into otherwise restricted network segments.
The record
- CVE
- CVE-2025-27253
- Published
- Mar 10, 2025
- Updated
- Oct 7, 2025
- Vendor
- GE Vernova
- Product
- Multilin L90
- Classifications
- CWE-15, T1090
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 10, 2025CVE publishedPublication date reported by the CVE source.
- Oct 7, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=7.0 <=8.60
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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