# CVE-2026-106931: EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability

> CVE-2026-106931: EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-106931
Last updated: 2026-10-21T15:42:24Z

- Published: 2026-10-14 04:45 UTC · Updated: 2026-10-21 15:42 UTC · Assigner: jpcert
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 2.5%, 85th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-10-20, federal due date 2026-10-23, ransomware use: Unknown
- CWE: CWE-78

## 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 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 vendors and products

- EG Secure Solutions Inc.: SiteGuard Server Edition for Apache httpd
- EG Secure Solutions Inc.: SiteGuard Server Edition for Apache httpd on FreeBSD
- EG Secure Solutions Inc.: SiteGuard Server Edition for IIS
- EG Secure Solutions Inc.: SiteGuard Server Edition for Nginx
- EG Secure Solutions Inc.: SiteGuard Server Edition for Nginx on FreeBSD

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-106931)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-106931)
- [https://jvn.jp/en/jp/JVN88474777/](https://jvn.jp/en/jp/JVN88474777/)
- [https://www.eg-secure.co.jp/siteguard/news/alert-202610-1](https://www.eg-secure.co.jp/siteguard/news/alert-202610-1)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-106931 · Markdown: https://rewindex.com/cve/CVE-2026-106931.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-106931 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:44:55.303Z