{"id":"CVE-2025-66738","title":"An issue in Yealink T21P_E2 Phone 52.84.0.15 allows a remote normal privileged attacker to execute arbitrary code via a crafted request the ping function of the diagnostic component.","summary":"An issue in Yealink T21P_E2 Phone 52.84.0.15 allows a remote normal privileged attacker to execute arbitrary code via a crafted request the ping function of the diagnostic component.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-77"],"vendor":"yealink","product":"sip-t21(p)e2_firmware","affected":["sip-t21(p)e2_firmware = 52.84.0.15"],"published":"2025-12-26","updated":"2026-10-05","sourceUpdated":"2026-10-05T18:10:00.200","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-66738","references":[{"url":"https://drive.google.com/file/d/13t5ywSPJMx4487njJcH3ZTNuc_k3h4ty/view?usp=sharing","label":"cve@mitre.org"}],"tags":["nvd"],"epss":0.00633,"epssPercentile":0.48551,"ingestedAt":"2026-10-05T18:29:11.161Z","slug":"CVE-2025-66738","body":"## Overview\n\nAn issue in Yealink T21P_E2 Phone 52.84.0.15 allows a remote normal privileged attacker to execute arbitrary code via a crafted request the ping function of the diagnostic component.\n\n## Affected\n\n- `sip-t21(p)e2_firmware = 52.84.0.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}