Authenticated code execution via unchecked forwarding-rule fields
Published Aug 26, 2025 · Updated Aug 26, 2025
Stack-based buffer overflow in Linksys RE-series firmware allows remote authenticated users to execute arbitrary code. The singlePortForwardAdd handler in mod_form.so copies unchecked ruleName, schedule, and inboundFilter values into a stack buffer, allowing the return address to be overwritten. An authenticated web session is required; the published proof of concept demonstrates a persistent service crash, while code execution is claimed but not demonstrated.
Summary
What happened
Stack-based buffer overflow in Linksys RE-series firmware allows remote authenticated users to execute arbitrary code. The singlePortForwardAdd handler in mod_form.so copies unchecked ruleName, schedule, and inboundFilter values into a stack buffer, allowing the return address to be overwritten. An authenticated web session is required; the published proof of concept demonstrates a persistent service crash, while code execution is claimed but not demonstrated.
The record
- CVE
- CVE-2025-9483
- Published
- Aug 26, 2025
- Updated
- Aug 26, 2025
- Vendor
- Linksys
- Product
- RE6250
- Classifications
- CWE-121, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 26, 2025CVE publishedPublication date reported by the CVE source.
- Aug 26, 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.
Public exploit references
- singlePortForwardAdd oversized ruleName 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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