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.

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Ip Phone Sip-t21p Subscribe
Sip-t21\(p\)e2 Subscribe
Sip-t21\(p\)e2 Firmware Subscribe
Sip-t21p E2 Subscribe
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 09 Jan 2026 21:00:00 +0000

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

Mon, 29 Dec 2025 23:15:00 +0000

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

Sat, 27 Dec 2025 16:15:00 +0000

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': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

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


Fri, 26 Dec 2025 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-77
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'}


Fri, 26 Dec 2025 16:15:00 +0000

Type Values Removed Values Added
Description 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.
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-12-27T15:34:23.693Z

Reserved: 2025-12-08T00:00:00.000Z

Link: CVE-2025-66738

cve-icon Vulnrichment

Updated: 2025-12-26T16:23:18.526Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-26T16:15:44.260

Modified: 2026-01-09T20:45:18.703

Link: CVE-2025-66738

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-29T23:04:09Z

Weaknesses