CVE-2025-26643Network attack vector

Content spoofing via undisclosed UI misaction

Published Mar 7, 2025 · Updated Feb 13, 2026

UI misbehavior in Microsoft Edge (Chromium-based) before 134.0.3124.51 allows remote attackers to spoof content over a network. Microsoft identifies the defect only as CWE-449 and has not disclosed the affected UI locus or the untrusted input that triggers the wrong action. A user must interact with attacker-controlled network content; Microsoft reports spoofing but does not identify the specific information misrepresented.

CVSS severity5.4
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UI misbehavior in Microsoft Edge (Chromium-based) before 134.0.3124.51 allows remote attackers to spoof content over a network. Microsoft identifies the defect only as CWE-449 and has not disclosed the affected UI locus or the untrusted input that triggers the wrong action. A user must interact with attacker-controlled network content; Microsoft reports spoofing but does not identify the specific information misrepresented.

The record

CVE
CVE-2025-26643
Published
Mar 7, 2025
Updated
Feb 13, 2026
Vendor
Microsoft
Product
Microsoft Edge (Chromium-based)
Classifications
CWE-449
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0.0 <134.0.3124.51

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Edge (Chromium-based)version=1.0.0.0 <134.0.3124.51

Published CVSS scores

5.4MicrosoftCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-449The UI Performs the Wrong Action

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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