{"answers":{"affected":"It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2021-27561 in the wild since at least 3 Nov 2021.","fix":"No fix has been published for CVE-2021-27561 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.","what":"CVE-2021-27561 is a critical command injection vulnerability in n/a, published on 15 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-27561 and fix it if it is affected.\n\nWhat it is: CVE-2021-27561 is a critical command injection vulnerability in n/a, published on 15 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2021-27561 in the wild since at least 3 Nov 2021.\n\nAffected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-27561/ (Markdown: https://insights.sbomify.com/CVE-2021-27561/index.md)","id":"CVE-2021-27561","markdown":"https://insights.sbomify.com/CVE-2021-27561/index.md","name":"CVE-2021-27561","record":{"aliases":["GHSA-743m-83p4-9349"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Yealink Device Management","requires_auth":"none","summary":"Unauthenticated attackers can execute arbitrary commands as root on Yealink Device Management systems via a specific API endpoint.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"device_management","vendor":"yealink"}],"cvss":{"score":9.8,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":1,"refs":[{"date":null,"kind":"nuclei","ref":"http/cves/2021/CVE-2021-27561.yaml","stars":null,"title":"YeaLink DM 3.6.0.20 - Remote Command Injection"}],"tier":"exploited"},"has_fix":null,"headline":"Yealink Device Management Server-Side Request Forgery (SSRF)","id":"CVE-2021-27561","indexable":true,"kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","knownRansomwareCampaignUse":"Unknown","product":"Device Management","requiredAction":"Apply updates per vendor instructions.","vendorProject":"Yealink","vulnerabilityName":"Yealink Device Management Server-Side Request Forgery (SSRF) Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"command_injection","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Arm Trusted Firmware Out-of-Bounds Write","id":"CVE-2021-27562"},"packages":[],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2021-27559"},"products":["n/a"],"published":"2021-10-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-10-21","vendors":["n/a"]},"summary":"Unauthenticated attackers can execute arbitrary commands as root on Yealink Device Management systems via a specific API endpoint.","url":"https://insights.sbomify.com/CVE-2021-27561/"}