The US Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-106931, a EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability, to its Known Exploited Vulnerabilities (KEV) catalog on October 20, 2026. CISA adds a flaw to the catalog when it has reliable evidence that attackers are exploiting it in the wild.
What CISA says
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.
— CISA KEV catalog entry for CVE-2026-106931
Key facts
| CVE | CVE-2026-106931 |
|---|---|
| Vendor / product | EG Secure Solutions SiteGuard Server Edition |
| Added to KEV | October 20, 2026 |
| Federal deadline | October 23, 2026 |
| Known ransomware use | Unknown |
| Weakness (CWE) | CWE-78 |
| CISA forensic triage | Yes |
| CVSS base score (NVD) | 8.5 High |
| CVSS vector | CVSS: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:X |
Who has to act, and by when
US federal civilian executive branch agencies are required to remediate the vulnerability by October 23, 2026. CISA urges all organizations to prioritize KEV-listed flaws as part of their vulnerability management.
CISA’s required action for this entry:
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.
References
- CISA Known Exploited Vulnerabilities Catalog https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- NIST NVD — CVE-2026-106931 https://nvd.nist.gov/vuln/detail/CVE-2026-106931
- www.eg-secure.co.jp https://www.eg-secure.co.jp/siteguard/news/alert-202610-1
- www.cisa.gov https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- www.cisa.gov https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk