CVE-2026-69462

CVE-2026-69462 is a heap-based buffer overflow (CWE-122) in the Windows Error Reporting (WER) component of Microsoft Windows. An authorized attacker with low-level credentials can trigger the flaw over a network, with some user interaction required, causing WER to mishandle data on the heap. Successful exploitation elevates the attacker's privileges on the compromised system, with high impact to confidentiality, integrity and availability on that host. Because WER ships as a default component of Windows client and server editions, potentially affected installations span the entire Windows install base, though the specific affected version ranges are not detailed in the available data. No public proof-of-concept, KEV listing, or confirmed in-the-wild exploitation is known; EPSS assigns only a 0.7% probability of exploitation within 30 days.

What to do: Apply Microsoft's security update addressing CVE-2026-69462 as soon as it is available through Windows Update, WSUS, or Intune, checking the Microsoft advisory for the correct cumulative/update for each Windows release in your estate. Until patched, reduce exposure by restricting low-privileged remote access to Windows hosts (e.g., RDP and other remote-management paths) since exploitation requires valid credentials and user interaction. With no public PoC or known exploitation, this fits a standard patch cycle, but prioritize internet-exposed, multi-user, and jump/remote-access systems.