CVEs / CVE-2026-106931
CVE-2026-106931: EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability
- Known exploited in the CISA KEV catalog since 20 Oct 2026
- high 8.5 CVSS 4.0 (from the CNA)
- EPSS 2.52% chance of exploitation in the next 30 days, higher than 84% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
EG Secure Solutions 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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| EG Secure Solutions Inc. SiteGuard Server Edition for Apache httpd | from Ver2.20, before Ver8.00 Update 5 | Ver8.00 Update 5 |
| EG Secure Solutions Inc. SiteGuard Server Edition for Nginx | from Ver2.20, before Ver8.00 Update 5 | Ver8.00 Update 5 |
| EG Secure Solutions Inc. SiteGuard Server Edition for IIS | from Ver2.20, before Ver8.00 Update 5 | Ver8.00 Update 5 |
| EG Secure Solutions Inc. SiteGuard Server Edition for Apache httpd on FreeBSD | from Ver2.20, before Ver7.00 Update 6 | Ver7.00 Update 6 |
| EG Secure Solutions Inc. SiteGuard Server Edition for Nginx on FreeBSD | from Ver2.20, before Ver7.00 Update 6 | Ver7.00 Update 6 |
Exploitation
| In CISA KEV since | 20 Oct 2026 |
|---|---|
| Due date for US federal agencies | 23 Oct 2026 |
| Used in ransomware campaigns | 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. |
Severity
| CVSS 4.0 | 8.5 highCVSS: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:XScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-78 |
References
- CVE-2026-106931 on NVD
- CVE-2026-106931 in the CISA KEV catalog
- https://www.eg-secure.co.jp/siteguard/news/alert-202610-1 (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- https://jvn.jp/en/jp/JVN88474777/ Third Party Advisory
- https://www.eg-secure.co.jp/siteguard/news/alert-202610-1 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-106931 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.