Security · Updated 18 Oct, 07:53 pm IST
SiteGuard WAF flaw lets attackers run commands as SYSTEM or root
Why it matters for readers: A widely used web firewall had a critical bug that allows attackers to run system commands, and it's already being exploited.
- The vulnerability is an OS command‑injection in the statistics function of SiteGuard Server Edition and has been assigned CVE-2026-106931.1
- Successful exploitation can yield SYSTEM or root privileges on affected machines when the statistics feature is enabled.1
- SiteGuard and Japan's CERT warn the flaw is critical and that abuse has already been confirmed in the wild.1
- Vulnerable versions include SiteGuard Server Edition for Apache, Nginx, and IIS (non‑FreeBSD) 2.20 and later prior to 8.00 Update 5, and FreeBSD builds prior to 7.00 Update 6.1
- SiteGuard says the product protects over 1.5 million websites and is active on about 500,000 WordPress sites, underscoring the potential impact.1
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