How to Fix CVE-2026-27513: Tenda F3 (Bundle Sibling)
By Sai Kiran Pandrala. Last verified: 2026-05-25.
CVE-2026-27513 is a sibling vulnerability in the same vendor advisory as CVE-2026-27511. Apply the same patched build and you close both. The technical detail below is what differs.
| Severity | 5.1 (Medium) |
|---|---|
| Actively exploited? | No public listing in CISA KEV |
| Affected | Tenda F3 0 to <=12.01.01.55_multi |
| Fixed in | Same patched build as CVE-2026-27511 |
| Type (CWE) | CWE-352 Cross-Site Request Forgery (CSRF) |
What's different about CVE-2026-27513?
Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a cross-site request forgery (CSRF) vulnerability in the web-based administrative interface. The interface does not implement anti-CSRF protections, allowing an attacker to induce an authenticated administrator to submit state-changing requests, which can result in unauthorized configuration changes.
How to fix CVE-2026-27513
Apply the patched build per the primary write-up: How to Fix CVE-2026-27511. All commands, verification steps, and rollback notes for Tenda F3 are listed there.
Frequently asked questions
Does the CVE-2026-27511 patch close CVE-2026-27513?
Yes. Both CVEs are addressed by the same vendor patch. Applying the patched build closes the full bundle.
Is CVE-2026-27513 listed in CISA KEV?
No public KEV listing at the time of this writing.
Where is the official advisory?
See https://www.tendacn.com/product/F3
References
- Official vendor advisory: https://www.tendacn.com/product/F3
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-27513
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary: How to Fix CVE-2026-27511
*Written by Sai Kiran Pandrala. Part of the Tenda F3 bundle. Full procedure at how-to-fix-cve-2026-27511.*