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CVE-2026-65639

Quick assessment

Affected
WebPros ConfigServer Security & Firewall
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ConfigServer Security & Firewall（CSF）的高级规则解析器中存在操作系统命令注入漏洞。该漏洞由对来自数据源的规则数据验证不足所致，使得能够控制已配置的允许/拒绝数据源的远程攻击者可以以 root 权限执行任意命令。 此漏洞影响最初由 ConfigServer 发布的软件版本，以及包含存在漏洞代码的由 WebPros 维护的分支版本。WebPros 已在 16.30 版本中修复了该漏洞。其他分支或独立维护的 ConfigServer Security & Firewall（CSF）版本

CVSS 9.5 · Critical

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-65639

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
OS command injection in the advanced-rule parser of ConfigServer Security & Firewall allows a remote attacker who controls a configured allow/deny feed to execute arbitrary commands as root, due to insufficient validation of feed-supplied rule data. The vulnerability affects versions of the software originally distributed by ConfigServer, as well as versions of the WebPros-maintained fork that contain the vulnerable code. WebPros has addressed the vulnerability in version 16.30. Other forks or independently maintained versions of ConfigServer Security & Firewall (CSF) may also be affected and should be evaluated independently.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WebPros ConfigServer Security & Firewall 2.15 ~ 16.30 -
ConfigServer ConfigServer Security & Firewall 2.15 ~ * -

II. Public POCs for CVE-2026-65639

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III. Intelligence Information for CVE-2026-65639

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Other References for CVE-2026-65639 (1)

Same Patch Batch · WebPros · 2026-09-10 · 4 CVEs total

CVE-2026-65638 9.2 CRITICAL ConfigServer Security & Firewall 16.30前 远程未认证RCE
CVE-2026-68488 Plesk 竞争条件致本地提权
CVE-2026-68487 Plesk Backup Manager 路径遍历致root任意文件写入

IV. Related Vulnerabilities

Same product: ConfigServer Security & Firewall
Same vendor: WebPros
Same weakness: CWE-78

V. Comments for CVE-2026-65639

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