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PatchSiren cyber security CVE debrief

CVE-2026-45488 Microsoft CVE debrief

CVE-2026-45488 is a medium-severity vulnerability in Microsoft Edge (Chromium-based) that allows an unauthorized attacker to perform spoofing over a network. The vulnerability has a CVSS score of 5.4 and is classified as CWE-451. This type of vulnerability can lead to user interface misrepresentation of critical information, potentially allowing attackers to deceive users into performing unintended actions. Organizations and individuals using Microsoft Edge (Chromium-based) should be aware of this vulnerability and take necessary precautions to mitigate the risk.

Vendor
Microsoft
Product
Microsoft Edge (Chromium-based)
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-03
Original CVE updated
2026-07-07
Advisory published
2026-07-03
Advisory updated
2026-07-07

Who should care

Organizations and individuals using Microsoft Edge (Chromium-based) should be aware of this vulnerability and take necessary precautions to mitigate the risk. This includes applying the latest security updates, monitoring for suspicious activity, and implementing additional security measures to prevent spoofing attacks. IT administrators and security teams responsible for managing Microsoft Edge deployments should prioritize patching and review compensating controls for exposed systems.

Technical summary

The vulnerability is caused by a user interface (UI) misrepresentation of critical information in Microsoft Edge (Chromium-based). An unauthorized attacker can exploit this vulnerability to perform spoofing over a network. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N. This vulnerability affects Microsoft Edge (Chromium-based) and has a CVSS score of 5.4.

Defensive priority

Medium

Recommended defensive actions

  • Apply the latest security updates for Microsoft Edge (Chromium-based)
  • Monitor for suspicious activity
  • Implement additional security measures to prevent spoofing attacks
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-03T21:17:00.183Z and was last modified on 2026-07-07T13:50:43.050Z. The NVD entry is currently Analyzed. The vulnerability has a CVSS score of 5.4 and is classified as CWE-451. Microsoft Edge (Chromium-based) is the affected product. The vulnerability allows an unauthorized attacker to perform spoofing over a network.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45488 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45488

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

  • CVE-2026-45488 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45488

    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.