CVE-2026-106931
Updated
- CVSS 4.0
- 8.5 HIGH
- EPSS
- 2.5% (85th pct)
- CISA KEV
- Exploited
- Published
- 2026-10-14
- Weakness
- CWE-78
EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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.
CISA notes
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.
Key Findings
as of 2026-11-12- CISA added CVE-2026-106931 to the KEV catalog 6 days after its CVE record was published. The median for entries added in 2026 so far is 12 days.
- Its current EPSS score (2.5%) is higher than that of 9% of CISA KEV entries.
Severity
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HOpen in CVSS calculator CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NOpen in CVSS calculator Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| EG Secure Solutions Inc. | EG Secure Solutions Inc. SiteGuard Server Edition for Apache httpd | Ver2.20 to <Ver8.00 Update 5 |
| EG Secure Solutions Inc. | EG Secure Solutions Inc. SiteGuard Server Edition for Nginx | Ver2.20 to <Ver8.00 Update 5 |
| EG Secure Solutions Inc. | EG Secure Solutions Inc. SiteGuard Server Edition for IIS | Ver2.20 to <Ver8.00 Update 5 (fixed ≥ Ver3.10; affected again ≥ Ver4.00 Update 5) |
| EG Secure Solutions Inc. | EG Secure Solutions Inc. SiteGuard Server Edition for Apache httpd on FreeBSD | Ver2.20 to <Ver7.00 Update 6 |
| EG Secure Solutions Inc. | EG Secure Solutions Inc. SiteGuard Server Edition for Nginx on FreeBSD | Ver2.20 to <Ver7.00 Update 6 |
References
2 linksRecord Details
- Published
- 2026-10-14
- Last updated
- 2026-10-21
- Assigner (CNA)
- jpcert
- Credited to
- -
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