CVE-2026-106931EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability
Known exploited — EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability
CISA confirmed this vulnerability is used in real attacks on 20.10.2026. Remediation deadline for US federal agencies: 23.10.2026.
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. https://www.eg-secure.co.jp/siteguard/news/alert-202610-1 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-106931
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| e-guardian | siteguard | 2.20 – < 8.00 | |
| EG Secure Solutions Inc. | SiteGuard Server Edition for Apache httpd | 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 IIS | 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 Nginx on FreeBSD | Ver2.20 – < Ver7.00 Update 6 |
References and patches
- https://www.eg-secure.co.jp/siteguard/news/alert-202610-1 Vendor Advisory
- https://jvn.jp/en/jp/JVN88474777/ Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-106931 US Government Resource
CPE matches (NVD) (27)
cpe:2.3:a:e-guardian:siteguard:*:*:*:*:server:apache:*:*≥ 2.20 < 8.00cpe:2.3:a:e-guardian:siteguard:8.00:-:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:8.00:update1:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:8.00:update2:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:8.00:update3:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:*:*:*:*:server:apache:*:*≥ 2.20 < 7.00cpe:2.3:a:e-guardian:siteguard:7.00:-:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update1:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update2:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update3:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update4:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update5:*:*:server:apache:*:*cpe:2.3:a:e-guardian:siteguard:*:*:*:*:server:nginx:*:*≥ 2.20 < 8.00cpe:2.3:a:e-guardian:siteguard:8.00:-:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:8.00:update1:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:8.00:update2:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:8.00:update3:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:*:*:*:*:server:nginx:*:*≥ 2.20 < 7.00cpe:2.3:a:e-guardian:siteguard:7.00:-:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update1:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update2:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update3:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update4:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:7.00:update5:*:*:server:nginx:*:*cpe:2.3:a:e-guardian:siteguard:*:*:*:*:server:internet_information_services:*:*≥ 2.20 < 3.10cpe:2.3:a:e-guardian:siteguard:*:*:*:*:server:internet_information_services:*:*≥ 4.10 < 8.00cpe:2.3:a:e-guardian:siteguard:8.00:update4:*:*:server:internet_information_services:*:*