CVE-2026-45488
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedUser interface (ui) misrepresentation of critical information in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
In the news
Third-party coverageSurfaced from public web coverage — external links open in a new tab.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThis is a spoofing vulnerability in Microsoft Edge (Chromium-based) where the user interface misrepresents critical information, allowing an unauthorized attacker to perform spoofing attacks over a network. The vulnerability stems from improper validation or rendering of UI elements that could deceive users about the authenticity of displayed content.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 150.0.4078.48CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- High
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Microsoft Edge Chromium is installedCheck for Microsoft Edge in the system - look for 'Microsoft Edge' in Program Files or Program Files (x86), or check via command: dir "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" 2>nul or dir "C:\Program Files\Microsoft\Edge\Application\msedge.exe" 2>nulAffected if Microsoft Edge Chromium is found on the system
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Obtain the installed Microsoft Edge versionLaunch Microsoft Edge, navigate to edge://settings/help, or run: "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --version or "C:\Program Files\Microsoft\Edge\Application\msedge.exe" --versionAffected if Unable to retrieve version information
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Compare installed version against affected rangeReview the version number obtained - the affected range is any version less than 150.0.4078.48 (for example: 150.0.4078.47, 149.0.x.x, 148.x.x.x, etc.)Affected if Installed version is less than 150.0.4078.48
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Verify Edge update statusCheck edge://settings/help for update availability, or look at the 'About Microsoft Edge' section to see if updates are pendingAffected if An update is available or version cannot be determined
The user is affected if Microsoft Edge Chromium is installed and the installed version is lower than 150.0.4078.48, as this is a browser UI rendering vulnerability that applies to any use of the vulnerable version.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped150.0.4078.48
Apply the latest Microsoft Edge security updates when released. Users should verify the legitimacy of unexpected or suspicious UI prompts and ensure browsers are kept current through organizational patch management processes.
Microsoft Edge Chromium 150.0.4078.48 or later
- Open Microsoft Edge browser
- Click the three-dot menu icon in the top-right corner
- Select 'Settings' from the dropdown menu
- Scroll down and click 'About Microsoft Edge'
- The browser will automatically check for updates and download version 150.0.4078.48 or later
- Click 'Restart' to complete the update after the download finishes
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-45488 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-45488 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data