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CVE-2021-27856— FatPipe software administrative account with no password

Quick assessment

Affected
FatPipe WARP
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FatPipe是美国FatPipe公司的一种 WAN 冗余技术，它为公司提供自动和动态故障转移，因为广域网组件或服务故障导致数据线连接中断。 FatPipe WARP, IPVPN和MPVPN 10.1.2r60p91 和 10.2.2r42之前版本存在安全漏洞，该漏洞源于系统内包括一个名为cmuser的帐户，该帐户具有管理权限且没有密码。

CVSS 9.8 · Critical EPSS 5.60% · P93

Public Exploits 1

Nuclei · 1 CVE-2021-27856.yaml [template]

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2021-27856

Vulnerability Information
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Vulnerability Title
FatPipe software administrative account with no password
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
FatPipe 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FatPipe是美国FatPipe公司的一种 WAN 冗余技术，它为公司提供自动和动态故障转移，因为广域网组件或服务故障导致数据线连接中断。 FatPipe WARP, IPVPN和MPVPN 10.1.2r60p91 和 10.2.2r42之前版本存在安全漏洞，该漏洞源于系统内包括一个名为cmuser的帐户，该帐户具有管理权限且没有密码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FatPipe WARP 10.1 ~ 10.1.2r60p91 -
FatPipe IPVPN 10.1 ~ 10.1.2r60p91 -
FatPipe MPVPN 10.1 ~ 10.1.2r60p91 -

II. Public POCs for CVE-2021-27856

# POC Description Source Link Shenlong Link
1 FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 contain an account named "cmuser" with administrative privileges and no password, letting attackers gain unauthorized admin access, exploit requires no authentication. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-27856.yaml POC Details
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III. Intelligence Information for CVE-2021-27856

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Other References for CVE-2021-27856 (3)

Same Patch Batch · FatPipe · 2021-12-15 · 5 CVEs total

CVE-2021-27855 8.8 HIGH FatPipe software allows privilege escalation
CVE-2021-27859 8.8 HIGH Missing authorization vulnerability in FatPipe software
CVE-2021-27857 7.5 HIGH FatPipe software allows unauthenticated configuration download
CVE-2021-27858 5.3 MEDIUM Missing authorization vulnerability in FatPipe software

IV. Related Vulnerabilities

Same product: WARP
Same vendor: FatPipe

V. Comments for CVE-2021-27856

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