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Known exploited vulnerability

CVE-2026-106931

highCVSS 4.0 8.5In CISA KEVEPSS 2.5%Published · EG Secure Solutions Inc.

The short answer

CVE-2026-106931 affects EG Secure Solutions Inc. SiteGuard Server Edition for Apache httpd and is rated high (CVSS 8.5). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-10-20: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-78.

Severity

8.5 high

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

Exploited (CISA KEV)

Yes, since Oct 20, 2026

Federal due date Oct 23, 2026

EPSS, next 30 days

2.5%

Higher than 85% of scored CVEs

How it can be exploited

Attack vector
Local
Attack complexity
Low
Attack requirements
None
Privileges required
Low
User interaction
None
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

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…

Affected products

SiteGuard Server Edition for Apache httpd, SiteGuard Server Edition for Nginx, SiteGuard Server Edition for IIS, SiteGuard Server Edition for Apache httpd on FreeBSD, SiteGuard Server Edition for Nginx on FreeBSD. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-106931 being exploited?

Yes. CISA added CVE-2026-106931 to its Known Exploited Vulnerabilities catalog on 2026-10-20, with a federal remediation due date of 2026-10-23.

How do I fix CVE-2026-106931?

CISA's 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…

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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