CVE-2026-106931
EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability
EG Secure Solutions SiteGuard Server Edition
CVSS
7.8HighExploit odds (EPSS)1.17%Chance of exploitation activity in the next 30 days, higher than 67% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
CISA required actionApply 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
Patching is not enoughCISA requires federal agencies to look for signs of compromise on affected systems, not only patch (forensic triage under BOD 26-04). Treat exposed systems as possibly compromised. CISA guidance
What fixes it
No source in this snapshot names a fixed version.
Timeline
- 14 Oct 2026, 04:45 UTCPublishedCVE List
- 18 Oct 2026, 22:41 UTCFirst reported exploitedBluesky: zero-day
- 20 Oct 2026Added to CISA KEVCISA KEV
Vendor and government advisories 1
Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.
Reports 6
3 outlets report exploitation. Reports are not confirmation; each links to its source.
- @mtcgroupllc.bsky.social: Exploited now: CVE-2026-106931 in EG Secure Solutions SiteGuard Server Edition. Added to CISA KEV Oct 20, 2026. CVSS 8.5. EG Secure Solutions SiteGuard Server Edition OS Command InBluesky: exploited in the wild, 21 Oct 2026
- @aiuto-ch.bsky.social: CISA KEV | CVE-2026-106931 | EG Secure Solutions / SiteGuard Server Edition CISA lists this vulnerability as exploited in the wild. Check affected products and vendor guidance. SouBluesky: exploited in the wild, 21 Oct 2026Exploitation reported
- @ninjaintelgroup.bsky.social: 🚨 NEW on CISA KEV — exploited in the wild EG Secure Solutions SiteGuard Server Edition: EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability CVE-2026-106Bluesky: exploited in the wild, 20 Oct 2026Exploitation reported
- @aipostdaily.bsky.social: CISA added CVE-2026-106931 to its Known Exploited Vulnerabilities list (2026-10-20). EG Secure Solutions SiteGuard Server Edition OS Command Injection EPSS today: 0.007 (no score 3Bluesky: exploited in the wild, 20 Oct 2026Exploitation reported
- CISA Adds Six Known Exploited Vulnerabilities to CatalogCISA advisories, 20 Oct 2026Exploitation reported
- @mariogalarza.bsky.social: SiteGuard WAF zero-day CVE-2026-106931 under active exploit: OS command injection as root via the default-on statistics feature. 500k+ WordPress sites in scope. Patch now, but pullBluesky: zero-day, 18 Oct 2026Zero-day
Description
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.
Text from CVE List
Affected versions 5
- SiteGuard Server Edition for Apache httpdaffected: Ver2.20 before Ver8.00 Update 5CVE List
- SiteGuard Server Edition for Nginxaffected: Ver2.20 before Ver8.00 Update 5CVE List
- SiteGuard Server Edition for IISaffected: Ver2.20 before Ver8.00 Update 5CVE List
- SiteGuard Server Edition for Apache httpd on FreeBSDaffected: Ver2.20 before Ver7.00 Update 6CVE List
- SiteGuard Server Edition for Nginx on FreeBSDaffected: Ver2.20 before Ver7.00 Update 6CVE List