CVE-2026-26149 Microsoft CVE debrief

Who should care

Defenders responsible for Microsoft Power Apps Desktop Client deployments should assess exposure and prioritize verification and updates to prevent potential spoofing attacks.

Why it matters

CVE-2026-26149 Microsoft Power Apps Desktop Client Spoofing Vulnerability allows an authorized attacker to perform spoofing over a network, requiring defenders to verify and update deployments.

• Verify and update Microsoft Power Apps Desktop Client to prevent potential spoofing attacks
• Monitor network traffic for potential spoofing attacks
• Implement additional security measures to prevent unauthorized access

Technical summary

The vulnerability exists due to improper neutralization of escape, meta, or control sequences in Microsoft Power Apps Desktop Client, allowing an authorized attacker to perform spoofing over a network. This vulnerability has a CVSS score of 9 and a severity of CRITICAL. The vulnerability affects Microsoft Power Apps Desktop Client deployments, and defenders should prioritize verifying and updating deployments to prevent potential spoofing attacks.

Defensive priority

Defenders should prioritize verifying and updating Microsoft Power Apps Desktop Client to prevent potential spoofing attacks.

Recommended defensive actions

• Verify and update Microsoft Power Apps Desktop Client to the latest version
• Monitor network traffic for potential spoofing attacks
• Implement additional security measures to prevent unauthorized access

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on affected versions and exploitation. The vulnerability exists in Microsoft Power Apps Desktop Client, and defenders should verify and update deployments to prevent potential spoofing attacks. The CVE record was published on 2026-04-14T16:56:57.430Z and has not been modified since then. Additional information may be available from the vendor advisory and patch information. The CVE

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.