{"id":"CVE-2021-27856","published":"2021-12-15T16:14:47Z","modified":"2024-09-17T01:31:27Z","title":"FatPipe software administrative account with no password","vendor":"FatPipe","product":"WARP","tier":"core","eol":null,"affectedVersions":[{"vendor":"FatPipe","product":"WARP","versions":[">= 10.1, < 10.1.2r60p91",">= 10.2, < 10.2.2r42"]},{"vendor":"FatPipe","product":"IPVPN","versions":[">= 10.1, < 10.1.2r60p91",">= 10.2, < 10.2.2r42"]},{"vendor":"FatPipe","product":"MPVPN","versions":[">= 10.1, < 10.1.2r60p91",">= 10.2, < 10.2.2r42"]}],"description":{"text":"FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 includes an account named \"cmuser\" that has administrative privileges and no password. Older versions of FatPipe software may also be vulnerable. The FatPipe advisory identifier for this vulnerability is FPSA002.","provenance":"source","from":"CVE.org"},"summary":{"text":"FatPipe WARP, IPVPN, and MPVPN software contains a built-in administrative account named \"cmuser\" that has no password. The flaw affects WARP, IPVPN, and MPVPN versions before 10.1.2r60p91 and 10.2.2r42, and older releases may also be affected. An attacker with network access to the device can log in as this account without authentication or user interaction, gaining full administrative control.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-31T22:21:52Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.05469,"percentile":0.92753,"date":"2026-10-31","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2023-05-05","exploitedFirstSeen":"2023-05-05","ransomware":false,"evidence":[{"url":"https://www.linkedin.com/pulse/how-i-hacked-group-hackers-operating-nigerian-banks-tale-sennaike/","date":"2023-05-05"}],"evidenceTotal":1,"provenance":"source"},"exploited":true,"otx":null,"cwes":[],"references":[{"url":"https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5684.php","tags":["x_refsource_MISC"]},{"url":"https://www.fatpipeinc.com/support/cve-list.php","tags":["x_refsource_CONFIRM"]},{"url":"https://www.zeroscience.mk/codes/fatpipe_backdoor.txt","tags":["x_refsource_MISC"]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-14594","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-14594","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":{"nuclei":[{"id":"CVE-2021-27856","name":"FatPipe WARP/IPVPN/MPVPN - Backdoor Account","severity":"critical","path":"http/cves/2021/CVE-2021-27856.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-27856.yaml"}],"provenance":"source"},"exploitRefs":[],"flow":[],"timeline":[{"date":"2021-12-15","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2021-27856","provenance":"source"},{"date":"2023-05-05","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.linkedin.com/pulse/how-i-hacked-group-hackers-operating-nigerian-banks-tale-sennaike/","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":65.4,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1276 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":18.55,"detail":"percentile 0.9275"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 nuclei template"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}