Authenticated router crash via unchecked ssid copy
Published May 27, 2026 · Updated May 27, 2026
Stack-based buffer overflow in HiPER 1250GW 3.2.7-210907-180535 and earlier allows remote authenticated users to crash the router. The Web Management Interface handler for /goform/formConfigFastDirectionW passes an oversized ssid value to strcpy without checking the destination buffer length. A valid Digest-authenticated management session and wrlessMode=4 reach the vulnerable branch; the published proof of concept demonstrates denial of service, while code execution has not been shown.
Summary
What happened
Stack-based buffer overflow in HiPER 1250GW 3.2.7-210907-180535 and earlier allows remote authenticated users to crash the router. The Web Management Interface handler for /goform/formConfigFastDirectionW passes an oversized ssid value to strcpy without checking the destination buffer length. A valid Digest-authenticated management session and wrlessMode=4 reach the vulnerable branch; the published proof of concept demonstrates denial of service, while code execution has not been shown.
The record
- CVE
- CVE-2026-9631
- Published
- May 27, 2026
- Updated
- May 27, 2026
- Vendor
- Shanghai Aitai Technology Co., Ltd.
- Product
- HiPER 1250GW
- Classifications
- CWE-119, CWE-121, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 27, 2026CVE publishedPublication date reported by the CVE source.
- May 27, 2026Record 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=3.2.7-210907-180535
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
- HiPER 1250GW formConfigFastDirectionW denial-of-service proof of conceptproof 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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