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CVE-2018-25258 is a local stack-based buffer overflow in RGui 3.5.0 on Windows. The flaw is present in the GUI preferences dialog and is triggered via crafted input supplied to the "Language for menus and messages" field. According to the provided content, overly long or malicious input corrupts stack memory, enabling structured exception handler (SEH) exploitation. The described exploit path uses SEH control to bypass DEP, then executes a ROP chain that invokes VirtualAlloc to obtain executable memory and ultimately run attacker-controlled payloads, resulting in arbitrary code execution in the context of the user running RGui.
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Cross-references every affected SKU, including bundled OEM variants.
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