CVE-2025-21399: Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability

Q: How do I fix CVE-2025-21399?

edge update: upgrade to 1.3.195.43. Exact commands for each OS are on this page.

Q: Is CVE-2025-21399 being exploited?

CVE-2025-21399 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-21399 affect?

CVE-2025-21399 affects edge update. Severity is high (CVSS 7.4). Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability

Q: How urgent is CVE-2025-21399?

Priority 49/100. High severity; Public exploit reference; On your watchlist

This month

HIGH 7.4WATCHLISTUPGRADE

CVE-2025-21399 is a high-severity flaw (CVSS 7.4) affecting edge update. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-426
Published	2025-01-17
Last modified	2026-06-17

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-01-17 20:15 UTCPublished CVE record published
2026-06-17 08:43 UTCUpdated Record last modified

microsoft edge update UPGRADE

Affected: < 1.3.195.43

Fixed in: 1.3.195.43

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy edge-update || rpm -q edge-update || edge-update --version

2. UPGRADE to 1.3.195.43 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade edge-update

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade edge-update

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-21399?

edge update: upgrade to 1.3.195.43. Exact commands for each OS are on this page.

Is CVE-2025-21399 being exploited?

CVE-2025-21399 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-21399 affect?

CVE-2025-21399 affects edge update. Severity is high (CVSS 7.4). Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability

How urgent is CVE-2025-21399?

Priority 49/100. High severity; Public exploit reference; On your watchlist

Software pages

Microsoft Edge vulnerabilities · Chromium vulnerabilities

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References

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