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PatchSiren cyber security CVE debrief

CVE-2026-45497 Microsoft CVE debrief

CVE-2026-45497 is a HIGH severity vulnerability in Microsoft Copilot, allowing an authorized attacker to execute code over a network due to improper neutralization of special elements used in a command. The vulnerability was published on 2026-06-04T23:17:32.250Z and modified on 2026-06-08T13:55:28.053Z. The CVSS score is 7.7.

Vendor
Microsoft
Product
Copilot
CVSS
HIGH 7.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-23
Advisory published
2026-06-04
Advisory updated
2026-07-23

Who should care

Users of Microsoft Copilot should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by improper neutralization of special elements used in a command, allowing an authorized attacker to execute code over a network. The CVSS vector is CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to fix the vulnerability.
  • Restrict access to the affected system to only authorized users.
  • Monitor the system for suspicious activity.

Evidence notes

The vulnerability is confirmed by Microsoft and has a CWE-77 weakness.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45497 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45497

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

  • CVE-2026-45497 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45497

    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.