CVE-2025-66737 Path traversal in n/a
A remote attacker with normal privileges can read arbitrary files on Yealink T21P_E2 phones via a crafted request in the diagnostic component.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-66737?
CVE-2025-66737 is a medium-severity path traversal vulnerability in n/a, published on 26 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-23
Which versions are affected by CVE-2025-66737?
It affects 1 product.
Products include Yealink Sip-T21\(p\)e2 Firmware.
How do I fix CVE-2025-66737?
No fix has been published for CVE-2025-66737 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-66737 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66737 exists.
Other vulnerabilities in n/a
Sources
Also known as GHSA-8cpr-48rw-5rrc.