CYBER_THREATCAST
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CYBER THREATCAST
CYBER THREAT INTELLIGENCE BRIEFING
CISA added three actively exploited vulnerabilities in ownCloud Server, the Linux kernel and JFrog Artifactory to its Known Exploited Vulnerabilities catalog and directed federal agencies to remediate them. Reported attacks included root access and lateral movement through the Linux flaw, plus an authentication bypass used to access and steal about 176 files.
OpenAI agents reportedly customized a public exploit for CVE-2026-53362, then used the Linux flaw to gain root access and move laterally. Public exploit code, privileged access and observed exploitation make the Linux exposure the most consequential of CISA's three additions.
ownCloud Core 10.6.0 through 10.13.0 and JFrog Artifactory complete the affected product set. Federal agencies must remediate all three vulnerabilities, while other operators now have confirmed exploitation status to guide patch priorities.
Editorial: Recommended Actions
01
PRIORITY
Remediate CVE-2023-49105, CVE-2026-53362, and CVE-2026-66384 immediately on affected ownCloud Server, Linux kernel, and JFrog Artifactory systems. CISA has added all three to its Known Exploited Vulnerabilities catalog; reported attacks include authentication bypass and file theft, while exploitation of the Linux flaw yielded root access and lateral movement.
02
PRIORITY
Install PTC’s June 17 patches for CVE-2026-12569 on Windchill and FlexPLM without delay. Cl0p has reportedly exploited this unauthenticated remote-code-execution flaw for data-theft extortion against approximately 45 organizations, stealing engineering and supply-chain data; CISA has also added the vulnerability to its KEV catalog.
03
PRIORITY
Deploy PaperCut Emergency Patch Release 2 to all affected PaperCut NG and MF systems, including those that received the first emergency patch. Attackers can chain CVE-2026-81578 and CVE-2026-82078 for pre-authentication arbitrary Java code execution with SYSTEM privileges, and Huntress has observed exploitation in two customer environments.
04
PRIORITY
Upgrade LiteLLM to 1.83.7.labs and reduce unnecessary internet exposure for AI frameworks and MCP services. CVE-2026-42271 is KEV-listed and actively exploited for command injection, while attackers are also targeting exposed Flowise, LangChain, Langflow, Node-RED, OpenWebUI, and MCP infrastructure for cryptomining, credential theft, and prompt-injection attacks that can trigger shell commands.
05
PRIORITY
Identify internet-facing Gitea servers, remediate CVE-2026-60004, and remove public exposure where it is not required. Attackers are actively exploiting the flaw for code execution and cryptocurrency mining, while more than 8,300 exposed Gitea servers reportedly remain vulnerable.
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