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CVE-2023-43896 is a high-severity buffer overflow vulnerability affecting Macrium Reflect 8.1.7544 and earlier. The available context identifies the vulnerable component as the psmounterex.sys driver used in backup/image-mount workflows. Microsoft later added this driver to the Windows Vulnerable Driver Blocklist as a security hardening measure, indicating the flaw is considered actively exploitable. Successful exploitation could allow privilege escalation or arbitrary code execution.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity buffer overflow vulnerability in the psmounterex.sys driver that could allow privilege escalation or arbitrary code execution.
A high-severity buffer overflow vulnerability in the psmounterex.sys kernel driver that can allow privilege escalation or arbitrary code execution.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.