Threat Intelligence / CVE / CVE-2026-42909

CVE-2026-42909

CVSS 7.5 (HIGH) · EPSS 0.4% · Priority 5/10 · Published 2026-06-09

As of 2026-06-23, CVE-2026-42909 is a CVSS 7.5 (HIGH-severity) vulnerability. EPSS exploitation probability 0.4%. Threadlinqs Intelligence tracks 1 threat exploiting it.

Last updated: 2026-06-23

Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CVSS v3 vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Weaknesses (CWE)

CWE-362, CWE-416

Threats tracking this CVE

Microsoft June 2026 Patch Tuesday — 198+ CVEs Including CVE-2026-49160 (HTTP.sys 'HTTP/2 Bomb' DoS), CVE-2026-50507 (BitLocker 'YellowKey' Bypass) and CVE-2026-45586 (Collaborative Translation Framework EoP) — HIGH

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42909

Full detection coverage & IOCs for threats exploiting CVE-2026-42909 are available via the Threadlinqs MCP server (Purple tier). View plans →

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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.