Hackers are wasting no time exploiting a newly disclosed critical vulnerability in NGINX, with security researchers already observing real-world attacks just days after its public release.<\/p>\n
Security researcher Patrick Garrity from VulnCheck revealed that threat actors are actively targeting CVE-2026-42945, a heap buffer overflow flaw<\/a> affecting both NGINX Open Source and NGINX Plus.<\/p>\n The vulnerability has quickly moved from disclosure to exploitation, highlighting how rapidly attackers weaponize newly published flaws.<\/p>\n According to VulnCheck\u2019s Initial Access team, the vulnerability allows an unauthenticated attacker to crash NGINX worker processes by sending specially crafted HTTP requests.<\/p>\n While this alone can cause denial-of-service (DoS) conditions, the risk becomes more severe under specific configurations.<\/p>\n In rare cases where Address Space Layout Randomization (ASLR)<\/a> is disabled, attackers may be able to achieve remote code execution (RCE).<\/p>\n However, researchers note that such scenarios are unlikely in modern deployments, as ASLR is widely enabled by default across most systems.<\/p>\n Another important limitation is that exploitation requires a specific NGINX rewrite configuration.<\/p>\n This means not every exposed NGINX server is vulnerable, reducing the overall attack surface. Still, the scale of potential exposure remains significant.<\/p>\n In a LinkedIn post, VulnCheck researcher Patrick Garrity said<\/a> Censys data indicates around 5.7 million internet-facing NGINX servers could be running vulnerable versions.<\/p>\n While only a subset of these systems may meet the exact conditions for exploitation, the large number underscores the urgency for patching and mitigation.<\/p>\n The rapid emergence of in-the-wild exploitation suggests that attackers are actively scanning for misconfigured or unpatched servers.<\/p>\n Early exploitation activity is often linked to opportunistic threat actors seeking initial access into target environments before organizations can respond.<\/p>\n This vulnerability is particularly concerning because NGINX is widely used as a web server, reverse proxy<\/a>, and load balancer across enterprise environments, cloud infrastructure, and critical applications.<\/p>\n A successful compromise could allow attackers to disrupt services or potentially gain deeper access to backend systems.<\/p>\n Security experts strongly advise organizations to review their NGINX configurations and apply patches or updates as soon as they become available.<\/p>\n Additionally, administrators should ensure that security protections like ASLR remain enabled and audit rewrite rules that could expose systems to this flaw.<\/p>\n The incident once again highlights a growing trend in cybersecurity: the shrinking window between vulnerability disclosure and active exploitation.<\/p>\n Organizations that delay patching even for a few days may already be at risk. As threat actors continue to automate scanning and exploitation, proactive vulnerability management remains one of the most effective defenses against emerging cyber threats.<\/p>\n Follow us on\u00a0Google News<\/a>,\u00a0LinkedIn<\/a>,\u00a0and\u00a0X<\/a>\u00a0to Get More Instant Updates.<\/strong><\/p>\n The post Hackers Actively Exploiting Critical NGINX RCE Vulnerability in the Wild<\/a> appeared first on Cyber Security News<\/a>.<\/p>\n<\/div>\nHackers Exploit NGINX RCE<\/strong><\/h2>\n
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