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8.1CRITICAL

Multiple Vulnerabilities in NGINX Could Allow for Remote Code Execution

📅 18 May 2026 at 20:17 UTC📰 CIS AdvisoriesView original source ↗

Multiple vulnerabilities have been discovered in NGINX, the most severe of which could allow for remote code execution. NGINX is a software used for web serving, reverse proxying, caching, and load balancing. Successful exploitation of the most severe of these vulnerabilities may allow an unauthenticated threat actor to crash vulnerable NGINX worker processes by sending crafted HTTP requests. Additionally, for systems with Address Space Layout Randomization (ASLR) disabled, exploitation may result in remote code execution. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have less rights on the system could be less impacted than those who operate with administrative user rights.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

Multiple vulnerabilities have been discovered in NGINX, allowing for remote code execution and potentially leading to unauthorized access or data corruption. The most severe vulnerability has a CVSS score of 8.1 (HIGH), indicating a significant risk.

⚙️Technical Details
💥Impact Assessment
Severity: HIGH
🛡️Recommended Actions
1Apply appropriate updates provided by F5 or other vendors to vulnerable systems immediately after testing
2Establish and maintain a documented vulnerability management process for enterprise assets
3Perform automated vulnerability scans of internal enterprise assets on a quarterly, or more frequent, basis
📦Affected Products
Nginx Open Source:0.6.271.30.0Nginx Plus:R32R36Nginx Instance Manager:2.16.02.21.1
🔐NVD Verified DataVERIFIED
CVE-2026-42945CVSS 8.1HIGH
Attack Vector
NETWORK
Complexity
HIGH
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-122
CVE-2026-42946CVSS 6.5MEDIUM
Attack Vector
NETWORK
Complexity
HIGH
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L
Weaknesses
CWE-823CWE-789
CVE-2026-40701CVSS 4.8MEDIUM
Attack Vector
NETWORK
Complexity
HIGH
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Weaknesses
CWE-416
CVE-2026-42934CVSS 4.8MEDIUM
Attack Vector
NETWORK
Complexity
HIGH
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Weaknesses
CWE-125

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