High cybersecurity update: CISA warns of hackers exploiting Langflow, N-central, Apache Tomcat flaws. NetworkFix reviewed the available source material to summarize the security issue, its potential impact and the defensive actions administrators should prioritize.
What Happened
Cybersecurity and Infrastructure Security Agency is giving federal agencies three days to mitigate vulnerabilities in IBM Langflow, N-central, and Apache Tomcat, all actively exploited. […] CISA warns of hackers exploiting Langflow, N-central, Apache Tomcat flaws The U.S. Tracked as CVE-2026-9198, the security issue in IBM’s Langflow visual framework for building AI agents is the most severe, with a critical rating of 9.8 out of 10. It allows an unauthenticated attacker to execute remotely on default Langflow deployments by chaining two API endpoints to bypass login and run code. In late July, multiple fully functional proof-of-concept (PoC) exploits for CVE-2026-9198 emerged in the public space, with complete instructions on how they can be leveraged. Two weeks ago, CISA issued an alert for another critical Langflow vulnerability (CVE-2026-0770) being exploited in attacks to gain remote code execution with root privileges. The vulnerability in N-able’s remote monitoring and management platform N-central is identified as CVE-2026-18576 and allows attackers to hijack administrative accounts without authentication. The flaw received a high-severity rating and has been patched by the vendor.
Technical Details
However, the fix was insufficient, and threat actors found a new way to exploit it. N-able warned customers on August 1st that hackers were actively exploiting the new vulnerability , which received the identifier CVE-2026-18576. The company urged customers to install it as the flaw impacted all versions of N-central before 2026.3. The Apache Tomcat vulnerability, tracked as CVE-2026-34486 , has a high-severity score of 7.5. It stems from an incomplete fix for CVE-2026-29146, a critical vulnerability with a severity rating of 9.8 that is described as the missing encryption of sensitive data. On July 30, researchers at Palo Alto Networks Unit 42 reported that a Chinese-speaking threat actor tried to exploit the CVE-2026-34486 vulnerability in a manual campaign to plant reverse shells on nine Apache Tomcat servers. CISA confirmed that threat actors are leveraging all three flaws in attacks and added them to its catalog of Known Exploited Vulnerabilities (KEV). However, the agency did not share what types of attacks are leveraging them, noting that it is unknown if they are used in ransomware campaigns. CISA has ordered federal agencies to apply available mitigations for the three targeted products by the end of Friday, July 7th.
Security Impact
Organizations using the affected technology should treat the report according to its high severity classification. Security teams log 54% of successful attacks and alert on just 14%. The Picus whitepaper shows how breach and attack simulation tests your SIEM and EDR rules so threats stop slipping by detection. CISA orders urgent action on actively exploited Langflow RCE flaw Critical Langflow RCE flaw exploited to hack AI app servers CISA: Microsoft SharePoint RCE flaw now actively exploited CISA sets urgent deadline to fix Cisco flaw exploited in attacks CISA orders feds to patch max severity Joomla plugin flaw by Friday Ionut Ilascu Ionut Ilascu is a technology writer with a focus on all things cybersecurity. The topics he writes about include malware, vulnerabilities, exploits and security defenses, as well as research and innovation in information security. His work has been published by Bitdefender, Netgear, The Security Ledger and Softpedia. "CISA has ordered federal agencies to apply available mitigations for the three targeted products by the end of Friday, July 7th." (end of article) Correction: it should read: "Friday, August 7th." Hotel Wi-Fi attacks use custom malware to breach Microsoft 365 accounts Massive ChainDrop npm supply-chain attack infects hundreds of packages OpenAI teases Astra, its next major AI model, after it solves 10 long-standing math problems Spend four hours inside a fully-simulated underground with DARKROOM. Webinar: Shadow AI in 2026 (and how attackers are taking advantage) AI is a data-breach time bomb: Read the new report Explore ESET’s H1 2026 Threat Report to uncover the latest AI, phishing, and ransomware trends.
Recommended Actions
- Identify whether the affected product, service or software is present in the environment.
- Review the original vendor or research advisory and verify affected versions before making configuration changes.
- Apply vendor-provided security updates or mitigations as soon as operationally practical.
- Review relevant security logs and monitoring alerts for signs of suspicious activity associated with the reported issue.
- Use the CVE identifiers, where available, to validate exposure through vulnerability-management and asset-inventory tools.
Security Details
- Severity: High
- Original source: BleepingComputer
Why This Matters
Cybersecurity teams should use reports like this as an input to risk-based vulnerability and threat management rather than relying on headline severity alone. Exposure depends on whether the affected technology is deployed, reachable by an attacker and protected by compensating controls. Confirming asset ownership, affected versions and available vendor fixes helps teams prioritize remediation while avoiding unnecessary emergency changes.
Original Report
NetworkFix recommends reviewing the complete original report from BleepingComputer for the authoritative technical context, affected versions, indicators and vendor-specific remediation details: Read the original report.
