CISA Adds Exploited SiteGuard Server Edition Command Injection to KEV
Tech GuruQuick Answer
CISA added CVE-2026-106931 to KEV after EG Secure Solutions confirmed exploitation. The flaw can let an unauthenticated remote attacker execute commands as root or SYSTEM when the SiteGuard statistics function is enabled. Preserve diagnostic evidence before applying the platform-specific fix.
Confirm Scope And Apply The Supported Remediation
What to do now: Inventory SiteGuard Server Edition, web-server platform, version, exposure, and statistics configuration; preserve diagnostic and incident evidence before changing the host; install the supported update or vendor patch; validate protection; and investigate affected exposed systems.
Last verified: 2026-10-21 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | SiteGuard Server Edition for Apache, Nginx, IIS, and FreeBSD |
|---|---|
| Advisory | CISA KEV: CVE-2026-106931 / SiteGuard Alert 202610-1 |
| CVE | CVE-2026-106931 |
| CISA KEV addition date | 2026-10-20 at 19:00:31 UTC |
| Vendor advisory date / latest vendor revision | 2026-10-14; EG Secure Solutions publishes the date without a time and no later vendor revision was identified |
| Affected versions | Version 2.20 and later when the statistics function is enabled: Apache, Nginx, and IIS builds before 8.00 Update5, and FreeBSD Apache or Nginx builds before 7.00 Update6. IIS versions 3.10 through 4.00 Update4 are not affected. |
| Fixed version | 8.00 Update5 for Apache, Nginx, and IIS, or 7.00 Update6 for FreeBSD Apache and Nginx; the vendor also provides patches for affected end-of-support branches |
| CVSS base score | 8.5 (CVSS v4.0) / 7.8 (CVSS v3.0) |
| CVSS severity | High |
| Exploitation status | EG Secure Solutions and CISA confirm evidence of active exploitation; known ransomware campaign use is unknown.; no exploitation claim is inferred. |
What Changed
EG Secure Solutions says an unauthenticated remote attacker can exploit the statistics function to execute arbitrary commands as root or SYSTEM and confirms exploitation. CISA added the CVE to KEV with an October 23 remediation due date for in-scope federal systems.
What To Validate Now
- Inventory. Identify SiteGuard Server Edition deployments, exact versions, web-server platform, statistics-function state, network exposure, operating identity, owners, and log locations.
- Establish applicability. Match each deployment to the platform-specific affected and fixed ranges. The statistics function is enabled by default; verify its actual state rather than assuming it was disabled.
- Remediate. Before changing the host, collect the vendor-requested diagnostic information. Then install 8.00 Update5, 7.00 Update6, or the vendor-provided branch patch as applicable.
- Validate. Confirm the resulting version, statistics-function and web-server operation, SiteGuard protection, and log collection; investigate affected exposed systems for command execution and post-exploitation activity.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
The vendor warns that applying an update or patch can erase diagnostic information needed to investigate exploitation, so collect it first. The statistics function is enabled by default. CISA's October 23 due date applies to in-scope federal systems; other organizations should use the confirmed exploitation evidence in their own prioritization.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
