Arbitrary File Overwrite via Symlink in Mitsubishi Electric ICONICS/GENESIS Services
CVE-2025-0921 is an execution-with-unnecessary-privileges vulnerability affecting multiple Mitsubishi Electric and Mitsubishi Electric Iconics Digital Solutions products, including GENESIS64, ICONICS Suite, MobileHMI, Hyper Historian, AnalytiX, IoTWorX, GENESIS32, BizViz, MC Works64, and GENESIS 11.00. The issue arises because privileged services perform file writes to attacker-influenced destinations without sufficient safeguards against symbolic-link redirection. According to the provided content, the vulnerable behavior is associated with the AlarmWorX64 MMX Pager Agent workflow, where the SMSLogFile path is stored in C:\ProgramData\ICONICS\IcoSetup64.ini and later used as a write destination by a privileged component such as PagerCfg.exe. A local authenticated attacker can create a symbolic link from the expected log file path to an arbitrary target file, causing the privileged service to overwrite or corrupt that target when logging occurs. The content specifically cites corruption of critical Windows files such as cng.sys as a practical exploitation example. The primary consequence described is destruction or corruption of files required for normal system operation, leading to denial of service on the affected Windows host.
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Recent activity
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Unknown (listed as a trending CVE affecting Iconics Suite; no technical details provided in the content).
An execution-with-unnecessary-privileges flaw in multiple services/components of Mitsubishi Electric Iconics Digital Solutions GENESIS64/Iconics Suite that can be abused by a local attacker to overwrite critical system binaries (via symlinked log file writes), leading to denial-of-service (e.g., Windows boot failure/repair loop) and potential privilege misuse.
A medium-severity privileged file system operations / unnecessary-privileges issue in multiple services/components of Mitsubishi Electric Iconics Digital Solutions GENESIS64 (Iconics Suite) that can be abused (e.g., via log file path manipulation and symlink redirection) to overwrite/corrupt critical system binaries, leading to loss of integrity/availability and potential denial of service (including unbootable Windows).
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