CVE-2026-57989Network attack vector

Unauthenticated network information disclosure

Published Jul 26, 2026 · Updated Jul 26, 2026

Origin validation error in Microsoft Edge before 150.0.4078.99 allows remote attackers to disclose information via unspecified network content. Microsoft has not published the affected browser component or the origin comparison that incorrectly accepts untrusted content. Successful exploitation requires user interaction; the published impact is limited to information disclosure, with no reported write or service interruption.

CVSS severity7.4
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in Microsoft Edge before 150.0.4078.99 allows remote attackers to disclose information via unspecified network content. Microsoft has not published the affected browser component or the origin comparison that incorrectly accepts untrusted content. Successful exploitation requires user interaction; the published impact is limited to information disclosure, with no reported write or service interruption.

The record

CVE
CVE-2026-57989
Published
Jul 26, 2026
Updated
Jul 26, 2026
Vendor
Microsoft
Product
Microsoft Edge (Chromium-based)
Classifications
CWE-346
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 26, 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 <150.0.4078.99

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Edge (Chromium-based)version=1.0.0.0 <150.0.4078.99

Published CVSS scores

7.4Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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