Threat Intelligence / CVE / CVE-2026-33114

CVE-2026-33114 — Microsoft Remote Desktop Client for Windows

CVSS v3.1 8.8 (HIGH) · EPSS 0.0% (higher than 22.4% of all scored CVEs) · Priority 5.3/10 · Published 2026-04-14

As of 2026-04-14, CVE-2026-33114 is a HIGH-severity vulnerability in Microsoft Remote Desktop Client for Windows, CVSS v3.1 8.8, EPSS 0.0% (22.4th percentile). Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-33114, most recently “Microsoft April 2026 Patch Tuesday — 163 CVEs / 88 Advisories (CVE-2026-32201 SharePoint Zero-Day Exploited In-The-Wild, CVE-2026-33825 Defender EoP Public PoC, CVE-2026-33824 IKE RCE CVSS 9.8, CVE-2026-33827 TCP/IP Wormable RCE)”.

Last updated: 2026-04-14

What is CVE-2026-33114?

A client-side parsing vulnerability in the Microsoft Remote Desktop Client allows remote code execution when a user connects to a rogue or attacker-controlled RDP server. The flaw is triggered during the initial connection negotiation phase, enabling an attacker hosting a malicious RDP server to execute arbitrary code on the connecting client system. This attack scenario is particularly dangerous in environments where users connect to external or untrusted RDP endpoints, or where an attacker can redirect RDP connections via DNS poisoning or man-in-the-middle techniques. This vulnerability was patched as part of the Microsoft April 2026 Patch Tuesday release.

The record classifies CVE-2026-33114 under weakness class CWE-20. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 3 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 151 days ago.

Severity and exploitation probability

CVSS v3.1 base score
8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (FIRST)
0.0% probability of exploitation in the next 30 days, higher than 22.4% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
5.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-04-14

Is CVE-2026-33114 being exploited?

It currently carries a trending score of 11 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-33114

The record marks a vendor fix as available for CVE-2026-33114. Patch reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33114. Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33114. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2026-33114

2 tracked threats in the Threadlinqs corpus reference CVE-2026-33114, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Seeded from threat-derived and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-33114 are available via the Threadlinqs MCP server (Purple tier). View plans →

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