Loading vulnerability…
CVE-2025-48817 is a remote code execution vulnerability in Microsoft Remote Desktop Client caused by improper validation and normalization of relative file paths during RDP file transfer negotiation. The flaw is characterized as a relative path traversal issue, and supporting reporting also associates it with improper access control. A malicious Remote Desktop Server can supply crafted relative paths that escape intended directory restrictions on the client side, enabling attacker-controlled file placement on the victim system. This behavior can be leveraged for arbitrary file write and subsequent code execution on the client, including through DLL hijacking scenarios, when a user connects with a vulnerable Remote Desktop Client.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A path traversal vulnerability in Microsoft's Remote Desktop Client (mstsc.exe) that can enable arbitrary file writes, DLL hijacking, and ultimately remote code execution.
A remote code execution vulnerability in Microsoft Remote Desktop Client caused by relative path traversal and improper access control. Exploitation requires a user to connect with the vulnerable RDP client to an attacker-controlled Remote Desktop Server.
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.