Privileged service interruption via firmware out-of-bounds write
Published Feb 10, 2026 · Updated Feb 10, 2026
Out-of-bounds write in Intel Ethernet Controller E810 firmware before cvl fw 1.7.8.x allows local users to interrupt service. Intel has not disclosed the affected firmware routine, the attacker-controlled input, or how the write crosses its destination buffer. Exploitation requires local privileged access and no user interaction; the documented consequence is loss of adapter or host availability.
Summary
What happened
Out-of-bounds write in Intel Ethernet Controller E810 firmware before cvl fw 1.7.8.x allows local users to interrupt service. Intel has not disclosed the affected firmware routine, the attacker-controlled input, or how the write crosses its destination buffer. Exploitation requires local privileged access and no user interaction; the documented consequence is loss of adapter or host availability.
The record
- CVE
- CVE-2025-27243
- Published
- Feb 10, 2026
- Updated
- Feb 10, 2026
- Vendor
- Topcon Positioning Systems, Inc.
- Product
- Intel Ethernet Controller E810
- Classifications
- CWE-787, T1499.004
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Feb 10, 2026CVE publishedPublication date reported by the CVE source.
- Feb 10, 2026Record 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=before version cvl fw 1.7.8.x
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.
Weakness, pattern, technique
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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