{"id":"CVE-2025-66737","title":"Yealink T21P_E2 Phone 52.84.0.15 is vulnerable to Directory Traversal","summary":"Yealink T21P_E2 Phone 52.84.0.15 is vulnerable to Directory Traversal. A remote normal privileged attacker can read arbitrary files via a crafted request result read function of the diagnostic component.","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-23"],"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-2025-66737","references":[{"url":"https://drive.google.com/file/d/1MpxnCL4koKupqWWDmY3ljlybjIPD8ieD/view?usp=sharing","label":"cve@mitre.org"}],"tags":["nvd"],"epss":0.00661,"epssPercentile":0.49897,"ingestedAt":"2026-10-05T18:29:11.161Z","slug":"CVE-2025-66737","body":"## Overview\n\nYealink T21P_E2 Phone 52.84.0.15 is vulnerable to Directory Traversal. A remote normal privileged attacker can read arbitrary files via a crafted request result read 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":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}