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8.8
TOTOLINK A3002RU Router: Stack-Based Overflow Risk
CVE-2026-26731
Summary
The TOTOLINK A3002RU router's DNS function has a bug that could allow an attacker to crash the device. This could cause the router to stop working, making your internet connection unavailable. You should update your router to the latest version to fix this issue.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| totolink | a3002ru_firmware | 2.1.1-b20211108.1455 | – |
Original title
TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer overflow via the routernamer`parameter in the formDnsv6 function.
Original description
TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer overflow via the routernamer`parameter in the formDnsv6 function.
nvd CVSS3.1
8.8
Vulnerability type
CWE-787
Out-of-bounds Write
CWE-121
Stack-based Buffer Overflow
- https://github.com/0xmania/cve/tree/main/TOTOLINK-A3002RU-boa-formDnsv6-StackOve... Exploit Third Party Advisory
Published: 17 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026