What is CVE-2021-27561?

CVE-2021-27561 is a vulnerability in N/a. Published 2021-10-15.

Is CVE-2021-27561 known to be exploited?

Yes. CVE-2021-27561 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.

Vulnerability in N/a

CVE-2021-27561

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

EPSS: 0.941 (99.9th percentile) — read the EPSS interpretation.

Affected products

N/a — versions n/a

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2021-11-17.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

ssd-disclosure.com/ (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-27561?: CVE-2021-27561 is a vulnerability in N/a. Published 2021-10-15.
Is CVE-2021-27561 known to be exploited?: Yes. CVE-2021-27561 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.