Authenticated code execution via unchecked staticIp copy
Published Aug 10, 2025 · Updated Aug 12, 2025
Stack overflow in Linksys RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 allows remote authenticated users to execute code. The setWan handler stores an unchecked staticIp value, and setLan later copies it into a stack variable, overwriting its return address. A valid web-management session is required; successful exploitation can run code on the device, while the demonstrated PoC persistently crashes its service.
Summary
What happened
Stack overflow in Linksys RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 allows remote authenticated users to execute code. The setWan handler stores an unchecked staticIp value, and setLan later copies it into a stack variable, overwriting its return address. A valid web-management session is required; successful exploitation can run code on the device, while the demonstrated PoC persistently crashes its service.
The record
- CVE
- CVE-2025-8819
- Published
- Aug 10, 2025
- Updated
- Aug 12, 2025
- Vendor
- Linksys
- Product
- RE6250
- Classifications
- CWE-121, CWE-119, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 10, 2025CVE publishedPublication date reported by the CVE source.
- Aug 12, 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?
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- Affected versionversion=20250801
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
- Linksys setWan staticIp proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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