CISA Adds Exploited Langflow and Trend Micro Apex One Vulnerabilities to KEV

CISA Adds Exploited Langflow and Trend Micro Apex One Vulnerabilities to KEV Ravie LakshmananMay 22, 2026Vulnerability / Cyber Attack The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added two security flaws impacting Langflow and Trend Micro Apex One to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The vulnerabilities in question are listed below - CVE-2025-34291 (CVSS score: 9.4) - An origin validation error vulnerability in Langflow that could allow an attacker to execute arbitrary code and achieve full system compromise. CVE-2026-34926 (CVSS score: 6.7) - A directory traversal vulnerability in on-premise versions of Trend Micro Apex One that could allow a pre-authenticated local attacker to modify a key table on the server to inject malicious code to deploy to agents on affected installations. In a report published in December 2025, Obsidian Security said CVE-2025-34291 exploits three combined weaknesses: overly Permissive CORS, lack of cross-site request forgery (CSRF) protection, and an endpoint that allows code execution by design. "The impact is severe: successful exploitation not only compromises the Langflow instance but also exposes all sensitive access tokens and API keys stored within the workspace," the company noted at the time. "This can trigger a cascading compromise across all integrated downstream services in cloud and SaaS environments." In a report published in March 2026, Ctrl-Alt-Intel said the vulnerability had been exploited by an Iranian hacking group named MuddyWater to obtain initial access to target networks. As for CVE-2026-34926, Trend Micro said it "observed at least one instance of an attempt to actively exploit one of these vulnerabilities in the wild." "This vulnerability is only exploitable on the on-premise version of Apex One and a potential attacker must have access to the Apex One Server and already obtained administrative credentials to the server via some other method to exploit this vulnerability," it added. In light of active exploitation, Federal Civilian Executive Branch (FCEB) agencies are required to apply the necessary fixes by June 4, 2026, to secure their networks. Found this article interesting? Follow us on Google News, Twitter and LinkedIn to read more exclusive content we post. SHARE     Tweet Share Share SHARE  Apex One, CISA, Code Execution, cybersecurity, Directory Traversal, KEV, Langflow, MuddyWater, Trend Micro, Vulnerability ⚡ Top Stories This Week New Fragnesia Linux Kernel LPE Grants Root Access via Page Cache Corruption Windows Zero-Days Expose BitLocker Bypasses And CTFMON Privilege Escalation Microsoft Patches 138 Vulnerabilities, Including DNS and Netlogon RCE Flaws cPanel CVE-2026-41940 Under Active Exploitation to Deploy Filemanager Backdoor Mini Shai-Hulud Worm Compromises TanStack, Mistral AI, Guardrails AI and More Packages ThreatsDay Bulletin: PAN-OS RCE, Mythos cURL Bug, AI Tokenizer Attacks, and 10+ Stories New Exim BDAT Vulnerability Exposes GnuTLS Builds to Potential Code Execution 18-Year-Old NGINX Rewrite Module Flaw Enables Unauthenticated RCE On-Prem Microsoft Exchange Server CVE-2026-42897 Exploited via Crafted Email Four OpenClaw Flaws Enable Data Theft, Privilege Escalation, and Persistence Ollama Out-of-Bounds Read Vulnerability Allows Remote Process Memory Leak Cisco Catalyst SD-WAN Controller Auth Bypass Actively Exploited to Gain Admin Access Hackers Used AI to Develop First Known Zero-Day 2FA Bypass for Mass Exploitation ⚡ Weekly Recap: Linux Rootkit, macOS Crypto Stealer, WebSocket Skimmers and More Microsoft's MDASH AI System Finds 16 Windows Flaws Fixed in Patch Tuesday [Webinar] How Modern Attack Paths Cross Code, Pipelines, and Cloud Load More ▼ ⭐ Featured Resources Identify Internal Attack Surfaces More Efficiently With a Free Assessment [Guide] Stop Email Fraud Before It Turns Into Ransomware Damage [eBook] Get the 3-Number SOC Diagnostic to Reduce Queue Risk [Webinar] Learn How to Handle Critical SOC Alerts With AI Support