Service crash via unbounded serverName copy
Published Dec 17, 2025 · Updated Dec 17, 2025
Buffer overflow in Tenda AC10 v4 firmware 16.03.10.20 allows remote attackers to crash the HTTP service via a crafted POST request. The fromAdvSetMacMtuWan handler in the httpd binary copies the serverName field submitted to /goform/AdvSetMacMtuWan into a fixed-size buffer without validating its length. The management endpoint must be reachable from an adjacent network; CISA records no confidentiality or integrity impact, so code execution is not established.
Summary
What happened
Buffer overflow in Tenda AC10 v4 firmware 16.03.10.20 allows remote attackers to crash the HTTP service via a crafted POST request. The fromAdvSetMacMtuWan handler in the httpd binary copies the serverName field submitted to /goform/AdvSetMacMtuWan into a fixed-size buffer without validating its length. The management endpoint must be reachable from an adjacent network; CISA records no confidentiality or integrity impact, so code execution is not established.
The record
- CVE
- CVE-2025-67074
- Published
- Dec 17, 2025
- Updated
- Dec 17, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120, T1499.004
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 17, 2025CVE publishedPublication date reported by the CVE source.
- Dec 17, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- CVE-2025-67074 proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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