Critical

CISA Adds Three Known Exploited Vulnerabilities to Catalog

All CISA Advisories

August 4, 2026 at 12:00 PM

Actively Exploited

Overview

The Cybersecurity and Infrastructure Security Agency (CISA) has added three vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, signaling active exploitation. The vulnerabilities include a code injection issue in IBM Langflow (CVE-2026-9198), an authentication bypass in N-able N-central (CVE-2026-18556), and a lack of encryption for sensitive data in Apache Tomcat (CVE-2026-34486). These vulnerabilities are significant threats to federal agencies and other organizations, as they can allow attackers to gain control over affected systems. CISA's Binding Operational Directive 26-04 emphasizes the need for rapid remediation of these high-risk vulnerabilities, urging federal agencies to act promptly. While the directive specifically targets federal agencies, CISA encourages all organizations to prioritize addressing these vulnerabilities to enhance their security posture.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: IBM Langflow, N-able N-central, Apache Tomcat
Action Required: Federal agencies are required to rapidly remediate these vulnerabilities, especially on publicly exposed assets.
Timeline: Newly disclosed

Original Article Summary

CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-9198 IBM Langflow Code Injection Vulnerability CVE-2026-18556 N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability CVE-2026-34486 Apache Tomcat Missing Encryption of Sensitive Data Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. Aware of an exploited vulnerability not currently listed in the KEV Catalog? Submit it for potential addition through CISA’s KEV Nomination Form. Potential KEV additions must have a CVE ID, evidence of exploitation, and clear mitigation guidance.

Impact

IBM Langflow, N-able N-central, Apache Tomcat

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Federal agencies are required to rapidly remediate these vulnerabilities, especially on publicly exposed assets. Specific patches or updates for the mentioned vulnerabilities are not detailed in the article, but organizations should evaluate their systems for these vulnerabilities and apply necessary updates or mitigations as soon as possible.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Vulnerability, Patch, and 2 more.

Read Original Article

Related Coverage

Ninja Forms plugin flaw exploited to hack WordPress sites

BleepingComputer

Hackers are actively exploiting security flaws in the Ninja Forms and WPC Product Bundles for WooCommerce WordPress plugins. These vulnerabilities allow attackers to execute stored cross-site scripting (XSS) attacks, which can lead to the installation of backdoors and the creation of unauthorized admin accounts on compromised sites. The impact is particularly concerning for website owners using these plugins, as it could lead to unauthorized access and control over their WordPress installations. Users should be vigilant and ensure their plugins are updated to protect against these attacks. The situation emphasizes the need for regular security checks and timely updates to safeguard web assets from exploitation.

Oct 6, 2026

ClickFix Attacks Evolve to Better Hide Malicious Payloads

darkreading

Recent developments in cyberattacks show that malicious actors are becoming more sophisticated in hiding their payloads. They are now using DNS TXT records and browser cache pre-fetching techniques to obscure their activities, making it harder for security teams to detect early signs of an attack. This evolution in tactics poses a significant challenge for organizations trying to protect their networks. As these methods become more prevalent, it is crucial for companies to enhance their monitoring capabilities and adapt their security strategies to identify these hidden threats. Users and organizations alike need to stay vigilant and informed about these evolving attack methods to better safeguard their systems.

Oct 6, 2026

Critical Healthcare Systems Aren't Quantum-Ready

darkreading

A recent study analyzed 2.5 million devices from 50 healthcare organizations and found that the industry is not adequately prepared for the future of quantum computing and its implications for data security. The research indicates that many healthcare systems are still relying on outdated cryptographic methods, which could leave sensitive patient data vulnerable as quantum technology advances. As quantum computers become more capable, they could potentially break current encryption standards, putting personal health information at risk. This lack of readiness is concerning for an industry that handles crucial and private data. The study calls for urgent upgrades to encryption methods to safeguard against future threats posed by quantum computing.

Oct 6, 2026

Hackers exploit 32 zero-days on first day of Pwn2Own Ireland

BleepingComputer

During the first day of the Pwn2Own Ireland 2026 competition, security researchers successfully hacked the Samsung Galaxy S26 twice, using 32 zero-day vulnerabilities. This impressive achievement earned them a total of $388,500 in prize money. The vulnerabilities exploited are a serious concern as they demonstrate the potential for attackers to compromise widely used devices. The competition, which focuses on discovering and reporting security flaws, underscores the ongoing challenges in mobile security. With these zero-days now identified, users of the Samsung Galaxy S26 should remain vigilant and await further guidance from the manufacturer regarding necessary security updates.

Oct 6, 2026

Linux Backdoors Impersonate Email Security Tools to Evade Detection in Korea and Taiwan

The Hacker News

Researchers have discovered Linux backdoors that are targeting telecom and network devices in South Korea and Taiwan. These backdoors cleverly disguise their malicious traffic as legitimate email services, making it difficult for security systems to detect them. Attackers often name their malware after real components of the operating system to avoid detection. This tactic not only helps the malware blend in but also poses significant risks to network security in these regions. The ongoing threat underscores the need for enhanced monitoring and detection measures in organizations that rely on Linux systems for critical infrastructure.

Oct 6, 2026

ASOS confirms data breach after “HACKED” in-app notifications

BleepingComputer

ASOS, the UK-based fashion retailer, has confirmed a data breach after hackers sent unauthorized push notifications through its mobile app. The attackers claimed to have accessed customer data from ASOS's Snowflake environment, raising concerns over the security of user information. While specific details about the stolen data have not been disclosed, the incident highlights vulnerabilities in the company's app security. Users of the ASOS mobile app should be on alert for potential phishing attempts or unusual activity in their accounts. This breach serves as a reminder for companies to prioritize data protection and for consumers to stay vigilant about their personal information online.

Oct 6, 2026