Service crash via oversized WAN MTU value
Published Apr 17, 2025 · Updated Apr 18, 2025
Stack-based buffer overflow in Tenda AC10 V4.0si_V16.03.10.20 allows remote attackers to crash the router via a WAN MTU request. The AdvSetMacMtuWan handler passes the attacker-controlled wanMTU2 value to strcpy in the webs binary without bounding it to the destination stack buffer. No authentication or user interaction is required, but the vulnerable path requires wans.flag to exceed zero; the demonstrated consequence is an httpd segmentation fault and service interruption.
Summary
What happened
Stack-based buffer overflow in Tenda AC10 V4.0si_V16.03.10.20 allows remote attackers to crash the router via a WAN MTU request. The AdvSetMacMtuWan handler passes the attacker-controlled wanMTU2 value to strcpy in the webs binary without bounding it to the destination stack buffer. No authentication or user interaction is required, but the vulnerable path requires wans.flag to exceed zero; the demonstrated consequence is an httpd segmentation fault and service interruption.
The record
- CVE
- CVE-2025-25455
- Published
- Apr 17, 2025
- Updated
- Apr 18, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-121, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 17, 2025CVE publishedPublication date reported by the CVE source.
- Apr 18, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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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
- wanMTU2 stack-overflow proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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