Nation-State Taiwan Security Firm Confirms Flaw Flagged by CISA Likely Exploited by Chinese APTs The vulnerability in TeamT5 ThreatSonar Anti-Ransomware was recently added to CISA’s KEV catalog. By Eduard Kovacs | February 24, 2026 (7:00 AM ET) Flipboard Reddit Whatsapp Whatsapp Email The Taiwan-based cybersecurity firm TeamT5 has confirmed that the vulnerability added recently by CISA to its Known Exploited Vulnerabilities (KEV) catalog was likely exploited by Chinese threat actors. The vulnerability added last week to the CISA KEV list is tracked as CVE-2024-7694 and it allows an attacker with admin privileges to upload malicious files, which can lead to arbitrary command execution on the server. The security hole was fixed in August 2024. TeamT5’s website indicates that the company’s solutions are used in the United States, Japan, and Taiwan, including by government agencies. This could explain why CISA added the vulnerability to its KEV catalog, instructing government agencies to address it by March 10. However, TeamT5 told SecurityWeek that the attacks exploiting CVE-2024-7694 occurred in 2024 and only targeted a few of its customers. Affected customers were notified at the time and assisted with patching and mitigations. The company’s investigation found it was a “highly coordinated and targeted attack” aimed at compromising the systems of high-profile customers. TeamT5 said the threat actor invested significant resources into finding a vulnerability in its ThreatSonar product. Advertisement. Scroll to continue reading. In a blog post published this week, the security firm said it helped all customers update the software in 2024, and it’s confident that no users are currently running a vulnerable version. When CISA added the vulnerability to its KEV catalog last week, SecurityWeek noted that Chinese threat actors may have been behind the attacks. TeamT5 has now told SecurityWeek that based on its investigation the exploitation was part of a supply chain attack likely conducted by Chinese APTs it tracks as Slime57 and Slime62. “The actor used hundreds of IP addresses, mostly compromised devices in Taiwan, to hide their real identity,” a TeamT5 spokesperson said. Related : Dell RecoverPoint Zero-Day Exploited by Chinese Cyberespionage Group Related : Web Hosting Firms in Taiwan Attacked by Chinese APT for Access to High-Value Targets Related : China Revives Tianfu Cup Hacking Contest Under Increased Secrecy Written By Eduard Kovacs Eduard Kovacs (@EduardKovacs) is the managing editor at SecurityWeek. He worked as a high school IT teacher before starting a career in journalism in 2011. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering. 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