CISA Identifies Four Actively Exploited Security Flaws in Latest KEV Update
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Quick Summary
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added four security vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation. These include CVE-2026-2441, a use-after-free vulnerability in Google Chrome, and CVE-2020-7796, a server-side request forgery vulnerability in Synacor Zimbra Collaboration Suite. The vulnerabilities pose significant risks, with CVE-2020-7796 linked to exploitation by around 400 IP addresses targeting multiple countries.
The Securityish Brief
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) recently updated its Known Exploited Vulnerabilities (KEV) catalog by adding four security flaws that are currently being exploited. The vulnerabilities include CVE-2026-2441, a use-after-free vulnerability in Google Chrome with a CVSS score of 8.8, which could allow remote attackers to exploit heap corruption via a crafted HTML page. Another critical vulnerability is CVE-2020-7796, a server-side request forgery (SSRF) flaw in Synacor Zimbra Collaboration Suite (ZCS) that has a CVSS score of 9.8 and could enable unauthorized access to sensitive information.
CVE-2024-7694, an arbitrary file upload vulnerability in TeamT5 ThreatSonar Anti-Ransomware versions 3.4.5 and earlier, could allow attackers to upload malicious files and execute arbitrary commands on the server. Additionally, CVE-2008-0015 is a stack-based buffer overflow vulnerability in Microsoft Windows Video ActiveX Control, which could allow remote code execution through a specially crafted web page.
Evidence of the exploitation of these vulnerabilities has been reported, particularly for CVE-2020-7796, which was highlighted in a March 2025 report by GreyNoise that identified around 400 IP addresses actively exploiting multiple SSRF vulnerabilities. This exploitation has targeted systems in various countries, including the U.S., Germany, Singapore, India, Lithuania, and Japan.
Microsoft has noted that when users visit web pages containing exploits like CVE-2008-0015, it may connect to remote servers to download additional malware, including the Dogkild worm. This worm is capable of overwriting system files and disrupting security processes, further complicating the security landscape.
Organizations, particularly Federal Civilian Executive Branch (FCEB) agencies, are advised to implement necessary fixes for these vulnerabilities by March 10, 2026, to ensure optimal protection against potential attacks.
Vulnerabilities Listed by CISA
- CVE-2026-2441 – A use-after-free vulnerability in Google Chrome that could allow remote exploitation via a crafted HTML page.
- CVE-2024-7694 – An arbitrary file upload vulnerability in TeamT5 ThreatSonar Anti-Ransomware that could enable malicious file uploads and command execution.
- CVE-2020-7796 – A server-side request forgery vulnerability in Synacor Zimbra Collaboration Suite that could allow unauthorized access to sensitive data.
- CVE-2008-0015 – A stack-based buffer overflow vulnerability in Microsoft Windows Video ActiveX Control that could lead to remote code execution.
Key Takeaways
- Update Google Chrome to the latest version to mitigate the risk of CVE-2026-2441.
- Ensure that TeamT5 ThreatSonar Anti-Ransomware is updated to versions later than 3.4.5 to address CVE-2024-7694.
- Implement security measures to protect against SSRF vulnerabilities like CVE-2020-7796, especially if using Synacor Zimbra Collaboration Suite.
- Regularly check for updates and patches for Microsoft Windows to protect against CVE-2008-0015.
- Monitor network traffic for unusual activity that may indicate exploitation attempts of these vulnerabilities.
Key Terms & Concepts
- CVE: In this article, CVE refers to a system for identifying and cataloging publicly known cybersecurity vulnerabilities.
- SSRF: Server-side request forgery (SSRF) is a vulnerability that allows an attacker to send crafted requests from a vulnerable server.
- Heap Corruption: Heap corruption is a type of memory corruption that can lead to unexpected behavior or security vulnerabilities in software.
- Use-After-Free: A use-after-free vulnerability occurs when a program continues to use memory after it has been freed, potentially allowing exploitation.
- Remote Code Execution: Remote code execution is a security vulnerability that allows an attacker to run arbitrary code on a remote system.
Read the original article here: https://thehackernews.com/2026/02/cisa-flags-four-security-flaws-under.html
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