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CVE-2025-48983 is a critical remote code execution vulnerability in the Mount service of Veeam Backup & Replication. The flaw affects version 12 builds, including 12.3.2.3617 and earlier version 12 releases, when deployed on domain-joined backup infrastructure hosts. The vulnerability is rooted in unsafe deserialization within the Mount service's .NET Remoting channel. The service uses serialized objects for remote communication and relies on a custom binary formatter with an allowlist of permitted classes; however, that allowlist is overly broad and can be abused through gadget chains in allowed types. An authenticated Active Directory domain user can send a specially crafted serialized object to the Mount service, causing malicious code to execute during deserialization in the service process.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical remote code execution vulnerability in the Mount service of Veeam Backup & Replication, allowing authenticated domain users to execute code on backup infrastructure hosts.
A critical remote code execution vulnerability in the Mount service of Veeam Backup & Replication caused by unsafe .NET Remoting deserialization, allowing any authenticated domain user to execute arbitrary code on domain-joined backup servers.
A critical remote code execution vulnerability in Veeam Backup & Replication with a CVSS score of 9.9.
A critical remote code execution vulnerability in the Mount service of Veeam Backup & Replication that allows an authenticated domain user to execute code on backup infrastructure hosts.
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.