Microsoft Edge (Chromium-based): Exposure of Private Personal Information to an Unauthorized Actor
CVE-2026-58296 is a high-severity exposure of private personal information to an unauthorized actor vulnerability in Microsoft Edge (Chromium-based) from Microsoft, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. The record lists version 150.0.4078.48 as the first without the flaw, so updating Microsoft Edge (Chromium-based) to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.54% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Microsoft Edge (Chromium-based) to 150.0.4078.48 or a later version.
- Update Edge Chromium to 150.0.4078.48 or a later version.
- Read the advisory on msrc.microsoft.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Microsoft | Microsoft Edge (Chromium-based) | 1.0.0.0 up to, but not including, 150.0.4078.48 | 150.0.4078.48 |
| Microsoft | Edge Chromium | before 150.0.4078.48 | 150.0.4078.48 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- RequiredA user must take an action such as opening a file or link.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N. Scored by CNA (microsoft.com).
Official description
Exposure of private personal information to an unauthorized actor in Microsoft Edge for Android allows an unauthorized attacker to disclose information over a network.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Exposure of Private Personal Information to an Unauthorized Actor
The product does not properly prevent a person's private, personal information from being accessed by actors who either (1) are not explicitly authorized to access the information or (2) do not have the implicit consent of the person about whom the information is collected.
How developers prevent this class of flaw
- Identify and consult all relevant regulations for personal privacy. An organization may be required to comply with certain federal and state regulations, depending on its location, the type of business it conducts, and the nature of any private data it handles. Regulations may include Safe Harbor Privacy Framework, Gramm-Leach Bliley Act (GLBA), Health Insurance Portability and Accountability Act (HIPAA), General Data Protection Regulation (GDPR), California Consumer Privacy Act (CCPA), and others.
More Exposure of Private Personal Information to an Unauthorized Actor vulnerabilities (CWE-359)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Microsoft Edge (Chromium-based)
- 7.4 High severity
- 8.1 High severity
- 8.8 High severity
- 8.8 High severity
Microsoft Windows Command Injection Exploited
- 8.1 High severity
- 7.8 High severity
Recent Exposure of Private Personal Information to an Unauthorized Actor vulnerabilities
- 7.1 High severity
- 7.5 High severity
- 7.5 High severity
- 7.1 High severity
- 7.1 High severity
- 7.5 High severity
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