Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authenticati
Affects Yealink Device Management (DM) version 3.6.0.20 and prior. The checked facts list no vendor rating and no fix.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Yealink Device Management (DM), a server application for managing Yealink phones and devices, is affected. An unauthenticated attacker could inject operating system commands through a web API endpoint and run them with root privileges, potentially taking full control of the server.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authentication.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- n/a n/a
Version range not reported
References 1
ssd-disclosure.com
Questions about CVE-2021-27561
What does this mean?
The flaw lets a remote party without a login run arbitrary commands on the server with root privileges, through the /sm/api/v1/firewall/zone/services URI.Source: ssd-disclosure.com
Am I affected, and how do I check?
The listed affected versions are Yealink DM 3.6.0.20 and earlier. Check the installed DM version against that range to see whether this applies to a given installation.Source: ssd-disclosure.com
What should I do about it?
The checked facts name no fixed version, so no upgrade target is given. Check the Yealink advisory for a fix before relying on any version.Source: ssd-disclosure.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2021-11-03, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
The checked facts list no workaround or fix. Until one is published, the facts offer no specific mitigation to recommend.Source: ssd-disclosure.com