CVE-2026-106931 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....
HighCVSS 8.5
EPSS 2.5%
CISA KEV
added 2026-10-20 · due 2026-10-23
Exploited in the wild
- Published
- Updated
- Exploit status
- Exploited in the wild (confirmed)
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.
CISA Known Exploited Vulnerability
- Date added
- 2026-10-20
- Due date (FCEB)
- 2026-10-23
- Ransomware use
- Unknown
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| EG Secure Solutions Inc. SiteGuard Server Edition for Apache httpd | >= Ver2.20, < Ver8.00 Update 5 | Ver8.00 Update 5 |
| EG Secure Solutions Inc. SiteGuard Server Edition for Nginx | >= Ver2.20, < Ver8.00 Update 5 | Ver8.00 Update 5 |
| EG Secure Solutions Inc. SiteGuard Server Edition for IIS | >= Ver2.20, < Ver3.10 | Ver3.10 |
| EG Secure Solutions Inc. SiteGuard Server Edition for IIS | >= Ver4.00 Update 5, < Ver8.00 Update 5 | Ver8.00 Update 5 |
| EG Secure Solutions Inc. SiteGuard Server Edition for Apache httpd on FreeBSD | >= Ver2.20, < Ver7.00 Update 6 | Ver7.00 Update 6 |
| EG Secure Solutions Inc. SiteGuard Server Edition for Nginx on FreeBSD | >= Ver2.20, < Ver7.00 Update 6 | Ver7.00 Update 6 |
| e-guardian siteguard | >= 2.20, < 8.00 | 8.00 |
| e-guardian siteguard | = 8.00 | No fix listed |
| e-guardian siteguard | = 8.00-update1 | No fix listed |
| e-guardian siteguard | = 8.00-update2 | No fix listed |
| e-guardian siteguard | = 8.00-update3 | No fix listed |
| e-guardian siteguard | >= 2.20, < 7.00 | 7.00 |
| e-guardian siteguard | = 7.00 | No fix listed |
| e-guardian siteguard | = 7.00-update1 | No fix listed |
| e-guardian siteguard | = 7.00-update2 | No fix listed |
| e-guardian siteguard | = 7.00-update3 | No fix listed |
| e-guardian siteguard | = 7.00-update4 | No fix listed |
| e-guardian siteguard | = 7.00-update5 | No fix listed |
| e-guardian siteguard | >= 2.20, < 3.10 | 3.10 |
| e-guardian siteguard | >= 4.10, < 8.00 | 8.00 |
| e-guardian siteguard | = 8.00-update4 | No fix listed |
References
- www.eg-secure.co.jp vendor-advisory
- jvn.jp third-party-advisory
- www.cisa.gov government-resource us-government-resource