Yealink · Device Management

CVE-2021-27561

Yealink Device Management Server-Side Request Forgery (SSRF) Vulnerability

Exploited in attacks Critical 9.8 Attack chance: 83%

What it is

Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authentication.

CISA: Yealink Device Management contains a server-side request forgery (SSRF) vulnerability that allows for unauthenticated remote code execution.

What to do

Apply updates per vendor instructions.

Deadline for US federal agencies: November 17, 2021

Added to the CISA list: November 3, 2021
Published: October 15, 2021
Severity: Critical 9.8 CVSS 3.1
Chance of attacks in the next 30 days (EPSS): 83% in the top 0.3% of all known vulnerabilities
Weakness: CWE-78
More details: NVD · CVE.org · CISA

All references (1)

https://ssd-disclosure.com/?p=4688

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.