CVE-2026-106931

HighCVSS 8.5/10Known exploited (CISA KEV)Last modified Oct 21, 2026

Description

SiteGuard Server Edition contains an OS command injection vulnerability, which may allow an attacker to execute arbitrary OS commands with root or SYSTEM privileges on the system running the affected product.

Metrics

CVSS 4.0 8.5/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weakness enumeration

CWE-78

Affected software

Vendor	Product	Versions
EG Secure Solutions Inc.	SiteGuard Server Edition for Apache httpd	>= Ver2.20, < Ver8.00 Update 5
EG Secure Solutions Inc.	SiteGuard Server Edition for Nginx	>= Ver2.20, < Ver8.00 Update 5
EG Secure Solutions Inc.	SiteGuard Server Edition for IIS	>= Ver2.20, < Ver8.00 Update 5
EG Secure Solutions Inc.	SiteGuard Server Edition for Apache httpd on FreeBSD	>= Ver2.20, < Ver7.00 Update 6
EG Secure Solutions Inc.	SiteGuard Server Edition for Nginx on FreeBSD	>= Ver2.20, < Ver7.00 Update 6

References

https://jvn.jp/en/jp/JVN88474777/Third Party Advisory
https://www.eg-secure.co.jp/siteguard/news/alert-202610-1Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-106931US Government Resource

Timeline

Published: Oct 14, 2026
Last modified: Oct 21, 2026
Added to CISA KEV: Oct 20, 2026
NVD status: Analyzed

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