criticalVulnerabilityRCE
NGINX Heap-Based Buffer Overflow
FortiGuard Threat Signal | Aug 25, 2026
What is the Vulnerability? FortiGuard Labs is tracking an exploitation risk associated with CVE-2026-42533, a heap-based buffer overflow vulnerability affecting NGINX Open Source and NGINX Plus. The flaw occurs when the map directive uses regex matching and capture variables i...
Evidence and analyst toolsscore 82
Sourcerss | ok | FortiGuard Threat Signal
FetchedBriefing Aug 28, 2026, 10:22 PM UTC; source published Aug 25, 2026, 3:31 AM UTC
Score inputsbase score 82, priority score 82, critical severity, 1 CVE, FortiGuard Threat Signal feed item, Mentions CVE-2026-42533, Watchlist: Fortinet, RCE
ConfidencePublic source-backed signal; summary and tags are triage aids.
Stack matchNo configured Stack Watch match
Missing dataCVSS not provided; EPSS not provided
#Fortinet#CVE-2026-42533#FortiGuard Threat Signal