Authenticated code execution via unchecked Ssid copy
Published Aug 20, 2025 · Updated Aug 21, 2025
Stack-based buffer overflow in Linksys RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 allows remote authenticated users to execute code. sta_wps_pin in mod_form.so copies an oversized Ssid value from a POST to /goform/sta_wps_pin into a fixed-size stack local without checking its length, overwriting the return address. A valid management session is required; the published proof of concept demonstrates a persistent service crash, while return-address control enables arbitrary code execution.
Summary
What happened
Stack-based buffer overflow in Linksys RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 allows remote authenticated users to execute code. sta_wps_pin in mod_form.so copies an oversized Ssid value from a POST to /goform/sta_wps_pin into a fixed-size stack local without checking its length, overwriting the return address. A valid management session is required; the published proof of concept demonstrates a persistent service crash, while return-address control enables arbitrary code execution.
The record
- CVE
- CVE-2025-9251
- Published
- Aug 20, 2025
- Updated
- Aug 21, 2025
- Vendor
- Linksys
- Product
- RE6250
- Classifications
- CWE-121, CWE-119, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 20, 2025CVE publishedPublication date reported by the CVE source.
- Aug 21, 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=1.0.013.001
- Affected versionversion=1.0.04.001
- Affected versionversion=1.0.04.002
- Affected versionversion=1.1.05.003
- Affected versionversion=1.2.07.001
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
- Oversized Ssid POST proof of conceptfunctional · demonstrated
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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