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CVE-2026-69550 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-19T22:17:09.530Z and has not been modified since then. CVE-2026-69550 is an out-of-bounds read vulnerability in Remote Desktop Client. This vulnerability allows an unauthorized attacker to disclose information over a network. The Common Vulnerability Scoring System (CVSS) score is 6.5, indicating a medium severity level. The vulnerability is categorized under CWE-125. Affected product: Microsoft Windows App on macOS, version up to 11.3.9. The vulnerability has been publicly disclosed and a patch is available from the vendor. Organizations should prioritize patching this vulnerability, particularly those relying on Remote Desktop Client for network access, as it poses a risk of information disclosure. Security teams should assess and mitigate this risk accordingly.

Vendor
Microsoft
Product
Windows App for Mac
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-19
Original CVE updated
2026-08-21
Advisory published
2026-08-19
Advisory updated
2026-08-21

Who should care

Organizations using Microsoft Windows App on macOS, particularly those relying on Remote Desktop Client for network access, should prioritize patching this vulnerability. The medium severity level and potential for information disclosure make it important for security teams to assess and mitigate this risk.

Technical summary

CVE-2026-69550 is an out-of-bounds read vulnerability in Remote Desktop Client. This vulnerability allows an unauthorized attacker to disclose information over a network. The Common Vulnerability Scoring System (CVSS) score is 6.5, indicating a medium severity level. The vulnerability is categorized under CWE-125. Affected product: Microsoft Windows App on macOS, version up to 11.3.9. The vulnerability has been publicly disclosed and a patch is available from the vendor.

Defensive priority

Medium-priority vulnerability in Remote Desktop Client allows unauthorized information disclosure over a network.

Recommended defensive actions

  • Apply the vendor patch for CVE-2026-69550
  • Restrict access to Remote Desktop Client
  • Monitor for suspicious network activity
  • Inventory and update affected Microsoft Windows App installations
  • Implement compensating controls for information disclosure risks

Evidence notes

The CVE-2026-69550 vulnerability is an out-of-bounds read issue in Remote Desktop Client. According to the NVD entry, this vulnerability allows an unauthorized attacker to disclose information over a network. The CVSS score is 6.5, indicating a medium severity level. The vulnerability is tracked under CWE-125. Affected product: Microsoft Windows App on macOS, version up to 11.3.9.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-19T22:17:09.530Z and has not been modified since then.