CVE-2026-42891

MEDIUMNVD 6.56.5—

6.5

User interface (ui) misrepresentation of critical information in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

CVSS v3: 6.5
EG Score: 6.5(high)
EPSS: 20.7%
KEV: Not listed

Published

May 12, 2026

Last Modified

May 14, 2026

References (1)

secure@microsofthttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42891

Vendor Advisories for CVE-2026-42891(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2026-42891
Microsoft Security Response Center (MSRC)Spoofing
Microsoft Edge (Chromium-based) for Android Spoofing Vulnerability

Frequently asked(5)

What is CVE-2026-42891?

CVE-2026-42891 is a medium vulnerability published on May 12, 2026. User interface (ui) misrepresentation of critical information in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

When was CVE-2026-42891 disclosed?

CVE-2026-42891 was first published in the National Vulnerability Database on May 12, 2026, with the most recent update on May 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-42891 actively exploited?

CVE-2026-42891 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-42891?

CVE-2026-42891 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2026-42891?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42891, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-42891

📅 Published

🔄 Last Modified

🔗 References (1)

📣 Vendor Advisories for CVE-2026-42891(1)

❓ Frequently asked(5)