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CVE-2026-45488· NVD / CVE Program· CNA microsoft

Microsoft Edge (Chromium-based) Spoofing Vulnerability

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

MediumCVSS 5.9 · v3.1—No exploit Fix available
Published
Jul 3, 2026
Updated
Sep 25, 2026
EPSS
0.4% · 28th percentile
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Report tools

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Action score

23

Monitor

Low priority for now.

CVSS
23 / 40 · 5.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.9
CNA · microsoft
5.4
0.5 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
microsoftedge chromium

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft edge chromiumbefore 150.0.4078.48

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft Microsoft Edge (Chromium-based)

    • 1.0.0.0 and later · before 150.0.4078.48affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-57983Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
    40Plan
  • CVE-2026-45495Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
    39Monitor
  • CVE-2024-43566Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
    39Monitor
  • CVE-2023-35618Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
    39Monitor
  • CVE-2023-36735Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
    39Monitor
  • CVE-2022-33649Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Microsoft Edge (Chromium-based)150.0.4078.48 · Release NotesMicrosoft (MSRC)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4289152 days apartMicrosoft Edge (Chromium-based) for Android Spoofing Vulnerability
    26Monitor
  • CVE-2026-0391148 days apartMicrosoft Edge (Chromium-based) for Android Spoofing Vulnerability
    26Monitor
  • CVE-2025-47963357 days apartMicrosoft Edge (Chromium-based) Spoofing Vulnerability
    26Monitor
  • CVE-2025-29825428 days apartMicrosoft Edge (Chromium-based) Spoofing Vulnerability
    26Monitor
  • CVE-2025-21262525 days apartMicrosoft Edge (Chromium-based) Spoofing Vulnerability
    21Monitor
  • CVE-2026-0385109 days apartMicrosoft Edge (Chromium-based) for Android Spoofing Vulnerability
    20Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
High
Availability impact
None

Weakness class (CWE)

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

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records