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PatchSiren cyber security CVE debrief

CVE-2026-58535 Microsoft CVE debrief

CVE-2026-58535 is a medium-severity vulnerability in Windows RDP that allows an unauthorized attacker to disclose information over a network. The vulnerability is caused by the use of an uninitialized resource in Windows RDP. This vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. Organizations using Windows RDP should prioritize patching this vulnerability to prevent potential information disclosure. The vulnerability affects Windows RDP and has not been modified since its publication.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

Organizations using Windows RDP should prioritize patching this vulnerability to prevent potential information disclosure. This vulnerability affects operators of Windows RDP, platform administrators, vulnerability management teams, and security teams. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Technical summary

The CVE-2026-58535 vulnerability is caused by the use of an uninitialized resource in Windows RDP. This allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. The affected product is Windows RDP. The defensive impact is that patching this vulnerability is crucial to prevent potential information disclosure.

Defensive priority

Patching this vulnerability is crucial to prevent potential information disclosure.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Review and update Windows RDP configurations
  • Monitor network activity for suspicious behavior
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

The CVE record was published on 2026-07-14T18:18:40.563Z and was last modified on 2026-07-22T17:39:38.860Z. The source of this information is the NVD and CVE.org. The vulnerability affects Windows RDP and has a CVSS score of 6.5. The evidence is limited, and defenders should verify the affected scope and severity. The CVE record does not provide detailed information on the exploitation of this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-58535 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-58535

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-58535 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-58535

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.