Authenticated device crash via unchecked hint copy
Published Aug 20, 2025 · Updated Aug 21, 2025
Stack overflow in Linksys RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 allows remote authenticated users to crash the device. The setPWDbyBBS function in mod_form.so copies the attacker-controlled hint parameter into a stack-local buffer without checking its length, overwriting the return address. A valid management session is required; the published request demonstrates persistent service loss, while arbitrary code execution is asserted but not demonstrated.
Summary
What happened
Stack overflow in Linksys RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 allows remote authenticated users to crash the device. The setPWDbyBBS function in mod_form.so copies the attacker-controlled hint parameter into a stack-local buffer without checking its length, overwriting the return address. A valid management session is required; the published request demonstrates persistent service loss, while arbitrary code execution is asserted but not demonstrated.
The record
- CVE
- CVE-2025-9250
- 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 hint HTTP request proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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