PatchTheCVEsip-t21\(p\)e2 firmware vulnerabilities and fixes
Recent CVEs affecting sip-t21\(p\)e2 firmware, with upgrade or downgrade steps. 2 tracked.
Also searched as: sip t21\(p\)e2 firmware, sip-t21\(p\)e2firmware.
sip-t21\(p\)e2 firmware has 2 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 0. Most recent: 2025-12-26. Highest priority: CVE-2025-66738 (score 48/100).
- CVE-2025-66737 MEDIUM 4.3 MITIGATE Yealink T21P_E2 Phone 52.84.0.15 is vulnerable to Directory Traversal
- CVE-2025-66738 HIGH 8.8 MITIGATE An issue in Yealink T21P_E2 Phone 52.84.0.15 allows a remote normal privileged attacker to execute arbitrary c
FAQ
How do I fix sip-t21\(p\)e2 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 sip-t21\(p\)e2 firmware being exploited right now?
None of the tracked sip-t21\(p\)e2 firmware CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which sip-t21\(p\)e2 firmware CVE should I patch first?
CVE-2025-66738 currently ranks highest (48/100): An issue in Yealink T21P_E2 Phone 52.84.0.15 allows a remote normal privileged attacker to execute arbitrary c.