PatchTheCVEac21 firmware vulnerabilities and fixes
Recent CVEs affecting ac21 firmware, with upgrade or downgrade steps. 1 tracked.
Also searched as: ac21firmware.
ac21 firmware has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 0. Most recent: 2026-03-23. Highest priority: CVE-2026-4565 (score 51/100).
- CVE-2026-4565 HIGH 8.8 MITIGATE A vulnerability was detected in Tenda AC21 16.03.08.16
FAQ
How do I fix ac21 firmware vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is ac21 firmware being exploited right now?
None of the tracked ac21 firmware CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which ac21 firmware CVE should I patch first?
CVE-2026-4565 currently ranks highest (51/100): A vulnerability was detected in Tenda AC21 16.03.08.16.