CVE-2026-106931 - Vulnerability Details

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.

Published: 2026-10-14

Score: 8.5 High

EPSS: 2.5% Low

KEV: Yes

Impact:

Action:

Analysis

Impact

SiteGuard Server Edition contains an OS command injection flaw that allows an attacker to run arbitrary operating system commands. The consequence is the gain of root or SYSTEM privileges, giving the attacker full control of the host—including data exfiltration, persistence, and lateral movement. The vulnerability is categorized as CWE‑78 and represents a high‑severity remote code execution risk.

Affected Systems

The affected products are EG Secure Solutions SiteGuard Server Edition for Apache httpd, Apache httpd on FreeBSD, IIS, Nginx, and Nginx on FreeBSD. All known releases of these products remain vulnerable as no specific version range has been published yet.

Risk and Exploitability

The CVSS score of 8.5 indicates high severity, while an EPSS score of 3% suggests that active exploitation is currently unlikely and the vulnerability is listed in the CISA KEV catalog. Attackers would need to craft a request that feeds unsanitized data into the SiteGuard module, after which the injected command executes with elevated privileges, compromising the entire operating system.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

EG Secure Solutions Inc.

SiteGuard Server Edition for Apache httpd

unaffected

Version	Status	Constraints
`Ver2.20`	affected	< Ver8.00 Update 5

EG Secure Solutions Inc.

SiteGuard Server Edition for Nginx

unaffected

Version	Status	Constraints
`Ver2.20`	affected	< Ver8.00 Update 5

EG Secure Solutions Inc.

SiteGuard Server Edition for IIS

unaffected

Version	Status	Constraints
`Ver2.20`	affected	< Ver8.00 Update 5

EG Secure Solutions Inc.

SiteGuard Server Edition for Apache httpd on FreeBSD

unaffected

Version	Status	Constraints
`Ver2.20`	affected	< Ver7.00 Update 6

EG Secure Solutions Inc.

SiteGuard Server Edition for Nginx on FreeBSD

unaffected

Version	Status	Constraints
`Ver2.20`	affected	< Ver7.00 Update 6

Configuration 1 [-]

OR	cpe:2.3:a:e-guardian:siteguard:::::server:apache::
	cpe:2.3:a:e-guardian:siteguard:8.00:-:::server:apache::
	cpe:2.3:a:e-guardian:siteguard:8.00:update1:::server:apache::
	cpe:2.3:a:e-guardian:siteguard:8.00:update2:::server:apache::
	cpe:2.3:a:e-guardian:siteguard:8.00:update3:::server:apache::

Configuration 2 [-]

AND

OR	cpe:2.3:a:e-guardian:siteguard:::::server:apache::
	cpe:2.3:a:e-guardian:siteguard:7.00:-:::server:apache::
	cpe:2.3:a:e-guardian:siteguard:7.00:update1:::server:apache::
	cpe:2.3:a:e-guardian:siteguard:7.00:update2:::server:apache::
	cpe:2.3:a:e-guardian:siteguard:7.00:update3:::server:apache::
	cpe:2.3:a:e-guardian:siteguard:7.00:update4:::server:apache::
	cpe:2.3:a:e-guardian:siteguard:7.00:update5:::server:apache::

cpe:2.3:o:freebsd:freebsd:-:*:*:*:*:*:*:*

Configuration 3 [-]

OR	cpe:2.3:a:e-guardian:siteguard:::::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:8.00:-:::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:8.00:update1:::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:8.00:update2:::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:8.00:update3:::server:nginx::

Configuration 4 [-]

AND

OR	cpe:2.3:a:e-guardian:siteguard:::::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:7.00:-:::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:7.00:update1:::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:7.00:update2:::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:7.00:update3:::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:7.00:update4:::server:nginx::
	cpe:2.3:a:e-guardian:siteguard:7.00:update5:::server:nginx::

cpe:2.3:o:freebsd:freebsd:-:*:*:*:*:*:*:*

Configuration 5 [-]

OR	cpe:2.3:a:e-guardian:siteguard:::::server:internet_information_services::
	cpe:2.3:a:e-guardian:siteguard:::::server:internet_information_services::
	cpe:2.3:a:e-guardian:siteguard:8.00:update4:::server:internet_information_services::

No data.

Vendor Product Confidence Versions

Eg Secure Solutions

Siteguard Server Edition For Apache Httpd

100%

Version	Status	Scheme	Platform
`[Ver2.20,Ver8.00 Update 5)`	affected	generic	—

Eg Secure Solutions

Siteguard Server Edition For Apache Httpd On Freebsd

100%

Version	Status	Scheme	Platform
`[Ver2.20,Ver7.00 Update 6)`	affected	generic	—

Eg Secure Solutions

Siteguard Server Edition For Iis

100%

Version	Status	Scheme	Platform
`[Ver2.20,Ver3.10)`	affected	generic	—
`[Ver3.10,Ver4.00 Update 5)`	unaffected	generic	—
`[Ver4.00 Update 5,Ver8.00 Update 5)`	affected	generic	—

Eg Secure Solutions

Siteguard Server Edition For Nginx

100%

Version	Status	Scheme	Platform
`[Ver2.20,Ver8.00 Update 5)`	affected	generic	—

Eg Secure Solutions

Siteguard Server Edition For Nginx On Freebsd

100%

Version	Status	Scheme	Platform
`[Ver2.20,Ver7.00 Update 6)`	affected	generic	—

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Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply the latest SiteGuard Server Edition patch released by EG Secure Solutions for all affected products (Apache, IIS, Nginx, and FreeBSD).
If a patch is not yet available or cannot be applied, disable or remove the SiteGuard module from the web server to eliminate the injection surface.
After remediation, monitor web traffic for suspicious requests and review server logs for any unexpected command executions.

Generated by OpenCVE AI on October 25, 2026 at 16:23 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v2

This CVE is in the KEV database since Oct. 20, 2026.

The EPSS score is 0.02528.

Exploitation active

Automatable no

Technical Impact total

References

Link	Providers
https://jvn.jp/en/jp/JVN88474777/
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-106931
https://www.eg-secure.co.jp/siteguard/news/alert-202610-1

History

Tue, 27 Oct 2026 04:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Eg Secure Solutions Eg Secure Solutions siteguard Server Edition For Apache Httpd Eg Secure Solutions siteguard Server Edition For Apache Httpd On Freebsd Eg Secure Solutions siteguard Server Edition For Iis Eg Secure Solutions siteguard Server Edition For Nginx Eg Secure Solutions siteguard Server Edition For Nginx On Freebsd
Vendors & Products		Eg Secure Solutions Eg Secure Solutions siteguard Server Edition For Apache Httpd Eg Secure Solutions siteguard Server Edition For Apache Httpd On Freebsd Eg Secure Solutions siteguard Server Edition For Iis Eg Secure Solutions siteguard Server Edition For Nginx Eg Secure Solutions siteguard Server Edition For Nginx On Freebsd

Fri, 23 Oct 2026 00:45:00 +0000

Type	Values Removed	Values Added
Title	OS Command Injection in SiteGuard Server Edition Grants Root Access

Wed, 21 Oct 2026 17:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		E-guardian E-guardian siteguard Freebsd Freebsd freebsd
CPEs		cpe:2.3:a:e-guardian:siteguard:::::server:apache:: cpe:2.3:a:e-guardian:siteguard:::::server:internet_information_services:: cpe:2.3:a:e-guardian:siteguard:::::server:nginx:: cpe:2.3:a:e-guardian:siteguard:7.00:-:::server:apache:: cpe:2.3:a:e-guardian:siteguard:7.00:-:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:7.00:update1:::server:apache:: cpe:2.3:a:e-guardian:siteguard:7.00:update1:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:7.00:update2:::server:apache:: cpe:2.3:a:e-guardian:siteguard:7.00:update2:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:7.00:update3:::server:apache:: cpe:2.3:a:e-guardian:siteguard:7.00:update3:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:7.00:update4:::server:apache:: cpe:2.3:a:e-guardian:siteguard:7.00:update4:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:7.00:update5:::server:apache:: cpe:2.3:a:e-guardian:siteguard:7.00:update5:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:8.00:-:::server:apache:: cpe:2.3:a:e-guardian:siteguard:8.00:-:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:8.00:update1:::server:apache:: cpe:2.3:a:e-guardian:siteguard:8.00:update1:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:8.00:update2:::server:apache:: cpe:2.3:a:e-guardian:siteguard:8.00:update2:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:8.00:update3:::server:apache:: cpe:2.3:a:e-guardian:siteguard:8.00:update3:::server:nginx:: cpe:2.3:a:e-guardian:siteguard:8.00:update4:::server:internet_information_services:: cpe:2.3:o:freebsd:freebsd:-:::::::*
Vendors & Products		E-guardian E-guardian siteguard Freebsd Freebsd freebsd

Tue, 20 Oct 2026 21:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 20 Oct 2026 20:30:00 +0000

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-106931

Tue, 20 Oct 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		kev `{'dateAdded': '2026-10-20T00:00:00+00:00', 'dueDate': '2026-10-23T00:00:00+00:00'}`

Fri, 16 Oct 2026 01:30:00 +0000

Type	Values Removed	Values Added
Title		OS Command Injection in SiteGuard Server Edition Grants Root Access

Thu, 15 Oct 2026 07:00:00 +0000

Type	Values Removed	Values Added
Title	OS Command Injection in SiteGuard Server Edition Enabling Privilege Escalation

Wed, 14 Oct 2026 15:30:00 +0000

Type	Values Removed	Values Added
Title		OS Command Injection in SiteGuard Server Edition Enabling Privilege Escalation

Wed, 14 Oct 2026 05:00:00 +0000

Type	Values Removed	Values Added
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.
Weaknesses		CWE-78
References		https://jvn.jp/en/jp/JVN88474777/ https://www.eg-secure.co.jp/siteguard/news/alert-202610-1
Metrics		cvssV3_0 `{'score': 7.8, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}` cvssV4_0 `{'score': 8.5, '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'}`

Subscriptions

E-guardian Siteguard

Eg Secure Solutions Siteguard Server Edition For Apache Httpd Siteguard Server Edition For Apache Httpd On Freebsd Siteguard Server Edition For Iis Siteguard Server Edition For Nginx Siteguard Server Edition For Nginx On Freebsd

Freebsd Freebsd

MITRE

Status: PUBLISHED

Assigner: jpcert

Published: 2026-10-14T04:45:07.678Z

Updated: 2026-10-21T03:56:27.300Z

Reserved: 2026-10-07T04:50:26.138Z

Link: CVE-2026-106931

Vulnrichment

Updated: 2026-10-16T15:29:49.735Z

NVD

Status : Analyzed

Published: 2026-10-14T05:16:42.633

Modified: 2026-10-21T15:42:24.590

Link: CVE-2026-106931

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-10-26T22:39:17Z

Weaknesses

CWE-78
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Exploitation active

Automatable no

Technical Impact total

Subscriptions

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