Authenticated code execution via unchecked request data
Published Feb 22, 2026 · Updated Feb 22, 2026
Buffer overflow in Tenda FH451 1.0.0.9 and earlier allows remote authenticated users to execute arbitrary code via a crafted HTTP request. The /goform/GstDhcpSetSer handler processes attacker-controlled request data without an adequate bounds check, but public sources do not identify the parameter or copy operation. Low-privileged management access is required; successful exploitation can take control of the router or interrupt its service.
Summary
What happened
Buffer overflow in Tenda FH451 1.0.0.9 and earlier allows remote authenticated users to execute arbitrary code via a crafted HTTP request. The /goform/GstDhcpSetSer handler processes attacker-controlled request data without an adequate bounds check, but public sources do not identify the parameter or copy operation. Low-privileged management access is required; successful exploitation can take control of the router or interrupt its service.
The record
- CVE
- CVE-2026-2911
- Published
- Feb 22, 2026
- Updated
- Feb 22, 2026
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- FH451
- Classifications
- CWE-119, CWE-120, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 22, 2026CVE publishedPublication date reported by the CVE source.
- Feb 22, 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=1.0.0.0
- Affected versionversion=1.0.0.1
- Affected versionversion=1.0.0.2
- Affected versionversion=1.0.0.3
- Affected versionversion=1.0.0.4
- Affected versionversion=1.0.0.5
- Affected versionversion=1.0.0.6
- Affected versionversion=1.0.0.7
- Affected versionversion=1.0.0.8
- Affected versionversion=1.0.0.9
What conditions does exploitation require?
What is affected?
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
- FH451 GstDhcpSetSer proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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