CVE•Published 2025-12-26•Modified 2026-07-05•1 article on news•6 live references•NVD data
CVE-2025-66738Yealink · Sip-t21\(p\)e2_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
44
Exploit Prediction Scoring System · top 56% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2025-12-26
Modified 2026-07-05
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-66738Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Sip-t21\(p\)e2 Firmware"Hosts Shodan identified as running Sip-t21\(p\)e2 Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2025-66738Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-66738Censys host search filtered to this CVE id.
grep.app
CVE-2025-66738Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-66738GitHub code search for direct mentions.
Google dork
"CVE-2025-66738" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2025-66738 on GitHub.