Windows Remote Desktop RDP File Spoofing Vulnerability
CVE-2026-26151 is a spoofing vulnerability in Windows Remote Desktop / Remote Desktop Connection caused by insufficient UI warning of dangerous operations when opening Remote Desktop Protocol (RDP) files. The issue allows attacker-controlled RDP content to be presented without adequate warning to the user, enabling a remote, unauthorized attacker to induce the user to trust or launch a malicious remote desktop connection. Microsoft’s April 2026 security update introduced new warnings in the Remote Desktop Connection application when users open RDP files, indicating the vulnerable condition was the lack of sufficiently prominent security prompts around risky RDP file handling.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Remote Desktop spoofing vulnerability addressed in part by new security warnings in the Remote Desktop Connection app when opening RDP files, intended to reduce dangerous user actions.
A Remote Desktop spoofing vulnerability allowing unauthenticated network spoofing via RDP.
A Remote Desktop spoofing vulnerability.
A spoofing vulnerability in Windows Desktop that Microsoft assesses as more likely to be exploited.
The version that knows your environment.
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.