CVE-2026-45488 — Microsoft Edge (Chromium-based) Spoofing Vulnerability

Executive Summary

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

Overview

5.9

CVSS MEDIUM

Moderate

MS Severity

Not Exploited

MS Exploit Status

N/A

MS Exploit Likelihood

Category Spoofing

Weakness CWE-451: User Interface (UI) Misrepresentation of Critical Information

Released Jul 14 2026

Last Updated Jul 14 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00249 — 0.16408 percentile

NVD CVSS 5.9 MEDIUM — differs from MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C

ATTACK VECTOR

Network

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

Low

INTEGRITY

Low

AVAILABILITY

None

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 4.7

EPSS Score

0.00249

probability of exploitation in the next 30 days

0.16408 percentile - updated 2026-08-14

View on FIRST.org

Affected Products

1 affected product

Product	KB Article	Severity	Impact	Restart Required
Microsoft Edge (Chromium-based)	`Release Notes (Security Update)`	Moderate	Spoofing	No

Patches

1 patch

Article	Type	Restart
`Release Notes`	Security Update	No

Exploits & PoC

No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.

Detection Rules

No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.

Acknowledgments

Moch. Azril
Barath Stalin K
Hafiizh
FARISSAL B
Francesco Jeremy Topol
Alfaz Hossain
xzyhellsing

References

MSRC Advisory MITRE NVD