Authenticated code execution via unchecked stack copy
Published Aug 23, 2025 · Updated Aug 25, 2025
Stack-based overflow in six Linksys RE extenders allows remote authenticated users to execute code through crafted URL-filter fields. In mod_form.so, urlFilterManageRule copies urlFilterRuleName, scheduleUrl, and addURLFilter into a stack local without length checks, allowing oversized input to overwrite its return address. A valid management session is required; the published request demonstrates a persistent service crash, while code execution is claimed but not demonstrated.
Summary
What happened
Stack-based overflow in six Linksys RE extenders allows remote authenticated users to execute code through crafted URL-filter fields. In mod_form.so, urlFilterManageRule copies urlFilterRuleName, scheduleUrl, and addURLFilter into a stack local without length checks, allowing oversized input to overwrite its return address. A valid management session is required; the published request demonstrates a persistent service crash, while code execution is claimed but not demonstrated.
The record
- CVE
- CVE-2025-9362
- Published
- Aug 23, 2025
- Updated
- Aug 25, 2025
- Vendor
- Linksys
- Product
- RE6250
- Classifications
- CWE-119, CWE-121, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 23, 2025CVE publishedPublication date reported by the CVE source.
- Aug 25, 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
- Authenticated urlFilterManageRule overflow requestproof 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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