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CVE-2026-106931

EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability

  • High 8.5
  • Exploited: added to CISA KEV 20 Oct 2026

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 facts

Published
14 Oct 2026
Last changed
21 Oct 2026
Assigned by
jpcert
KEV added
20 Oct 2026
KEV fix due
23 Oct 2026
EPSS
2.528% likely to be exploited in the next 30 days, higher than 85.157% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 7.8CVSS 3.0, Highfrom the CNA (jpcert)CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • 8.5CVSS 4.0, Highfrom the CNA (jpcert)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

What 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 evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
EG Secure Solutions Inc.SiteGuard Server Edition for Apache httpd
  • Default status: unaffected
  • Ver2.20 up to but excluding Ver8.00 Update 5 (affected)
EG Secure Solutions Inc.SiteGuard Server Edition for Nginx
  • Default status: unaffected
  • Ver2.20 up to but excluding Ver8.00 Update 5 (affected)
EG Secure Solutions Inc.SiteGuard Server Edition for IIS
  • Default status: unaffected
  • Ver2.20 up to but excluding Ver8.00 Update 5 (affected); at Ver3.10 unaffected, at Ver4.00 Update 5 affected
EG Secure Solutions Inc.SiteGuard Server Edition for Apache httpd on FreeBSD
  • Default status: unaffected
  • Ver2.20 up to but excluding Ver7.00 Update 6 (affected)
EG Secure Solutions Inc.SiteGuard Server Edition for Nginx on FreeBSD
  • Default status: unaffected
  • Ver2.20 up to but excluding Ver7.00 Update 6 (affected)

Timeline

  1. 14 Oct 2026 Published
  2. 20 Oct 2026 CVE-2026-106931 added to CISA KEV
  3. 20 Oct 2026 Added to the CISA KEV catalogue

Weakness

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Related coverage

References