Command Injection Vulnerability in Yealink Device Management
CVE-2021-27561

9.8CRITICAL

Key Information:

Vendor

Yealink

Status
Device Management
Vendor
CVE Published:
15 October 2021

Badges

👾 Exploit Exists🟣 EPSS 94%🦅 CISA Reported

What is CVE-2021-27561?

Yealink Device Management version 3.6.0.20 is susceptible to a command injection vulnerability that allows unauthorized users to execute arbitrary commands as root. This can be exploited through the /sm/api/v1/firewall/zone/services URI, which poses a significant threat to the integrity of network systems. Administrators should take immediate action to mitigate risks associated with this vulnerability.

CISA has reported CVE-2021-27561

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2021-27561 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

References

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

EPSS Score

94% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.