CVE-2025-66737

Published Dec 26, 2025 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Yealink sip-t21\(p\)e2
Yealink sip-t21\(p\)e2 Firmware
CPEs cpe:2.3:h:yealink:sip-t21\(p\)e2:-:*:*:*:*:*:*:*
cpe:2.3:o:yealink:sip-t21\(p\)e2_firmware:52.84.0.15:*:*:*:*:*:*:*
Vendors & Products Yealink sip-t21\(p\)e2
Yealink sip-t21\(p\)e2 Firmware
Type Values Removed Values Added
First Time appeared Yealink
Yealink ip Phone Sip-t21p
Yealink sip-t21p E2
Vendors & Products Yealink
Yealink ip Phone Sip-t21p
Yealink sip-t21p E2
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-23
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jul 5, 2026, 1:24 AM
Reserved
Dec 8, 2025, 12:00 AM
Status
Modified
Published
Dec 26, 2025, 5:15 PM
Modified
Oct 13, 2026, 9:10 AM