CVE-2026-1637
HIGHCVSS 8.8/10EPSS 0.65%
Last modified
CVE-2026-1637 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. EPSS estimates a 0.65% chance of exploitation in the next 30 days.
Description
A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tenda | Ac21 Firmware | 16.03.08.16 |
References
- https://github.com/LX-LX88/cve/issues/25Broken Link
- https://vuldb.com/?ctiid.343416Permissions Required, VDB Entry
- https://vuldb.com/?id.343416Third Party Advisory, VDB Entry
- https://vuldb.com/?submit.740865Third Party Advisory, VDB Entry
- https://www.tenda.com.cn/Product
- https://github.com/LX-LX88/cve/issues/25Broken Link
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-1637?
A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
How severe is CVE-2026-1637?
CVE-2026-1637 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.
How do I fix CVE-2026-1637?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-16364Incorrect boundary conditions in the Audio/Video: Playback c…9.1
- CVE-2026-16365Privilege escalation in the DOM: Workers component. This vul…8.8
- CVE-2026-16366Privilege escalation in the DOM: Navigation component. This …8.8
- CVE-2026-16367Sandbox escape due to invalid pointer in the Disability Acce…10
- CVE-2026-16368Incorrect boundary conditions in the JavaScript: WebAssembly…9.8
- CVE-2026-16369Integer overflow in the JavaScript: WebAssembly component. T…9.8
- CVE-2026-16370Mitigation bypass in the DOM: Networking component. This vul…9.1
- CVE-2026-16371Privilege escalation in the DOM: Navigation component. This …8.8
- CVE-2026-16372Privilege escalation in the DOM: Content Processes component…8.8
- CVE-2026-16373Information disclosure in the Privacy component in Firefox f…7.5
- CVE-2026-16374Information disclosure in the Framework component in DevTool…7.5
- CVE-2026-16375Site isolation issue in the Networking: HTTP component. This…9.8
Are you affected by CVE-2026-1637?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST