Authenticated code execution via unchecked parameter copies
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. DHCPReserveAddGroup in mod_form.so copies attacker-controlled enable_group, name_group, ip_group, and mac_group values into stack buffers without length checks, overwriting its return address. A valid web-management session is required; the published request demonstrates a persistent service crash, while return-address control enables 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. DHCPReserveAddGroup in mod_form.so copies attacker-controlled enable_group, name_group, ip_group, and mac_group values into stack buffers without length checks, overwriting its return address. A valid web-management session is required; the published request demonstrates a persistent service crash, while return-address control enables code execution.
The record
- CVE
- CVE-2025-9249
- Published
- Aug 20, 2025
- Updated
- Aug 21, 2025
- Vendor
- Linksys
- Product
- RE6250
- Classifications
- CWE-121, CWE-119, T1190
- 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
Compare your product and version with the public record. A matching version still requires validation against your environment.
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
- DHCPReserveAddGroup oversized mac_group requestfunctional · 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
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo