Authenticated router crash via administrative request overflow
Published Jul 9, 2026 · Updated Jul 9, 2026
Stack buffer overflow in the Mercusys MW302R administrative interface allows remote authenticated users to crash firmware 1.4.10 Build 231023. The disclosure does not name the request handler or input field, but states that crafted request data overwrites a stack buffer and redirects control flow to an arbitrary instruction address. Exploitation requires administrative authentication and adjacent-network access; the documented consequence is a system crash, with no confidentiality or integrity impact reported.
Summary
What happened
Stack buffer overflow in the Mercusys MW302R administrative interface allows remote authenticated users to crash firmware 1.4.10 Build 231023. The disclosure does not name the request handler or input field, but states that crafted request data overwrites a stack buffer and redirects control flow to an arbitrary instruction address. Exploitation requires administrative authentication and adjacent-network access; the documented consequence is a system crash, with no confidentiality or integrity impact reported.
The record
- CVE
- CVE-2026-31267
- Published
- Jul 9, 2026
- Updated
- Jul 9, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-121, T1499
- Attack vector
- adjacent
- Privileges
- admin
Timeline
How it unfolded
- Jul 9, 2026CVE publishedPublication date reported by the CVE source.
- Jul 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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