A critical pre-authentication vulnerability in ownCloud (CVE-2023-49105, CVSS 9.8) was actively exploited by a suspected Chinese-speaking threat actor to breach a nuclear research institute in the Philippines and exfiltrate sensitive records. CISA has added the flaw to its Known Exploited Vulnerabilities catalog, confirming active in-the-wild exploitation and prompting mandated remediation for federal agencies.
Updated Aug 30, 2026 · CVSS 9.8