CVE-2026-58525: Improper access control in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a securit

Q: How do I fix CVE-2026-58525?

edge chromium: upgrade to 150.0.4078.50. Exact commands for each OS are on this page.

Q: Is CVE-2026-58525 being exploited?

CVE-2026-58525 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-2026-58525 affect?

CVE-2026-58525 affects edge chromium. Severity is high (CVSS 8.2). Improper access control in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.

Q: How urgent is CVE-2026-58525?

Priority 45/100. High severity; On your watchlist

This month

HIGH 8.2WATCHLISTUPGRADE

CVE-2026-58525 is a high-severity flaw (CVSS 8.2) affecting edge chromium. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper access control in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-07-08
Last modified	2026-10-25

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-08 21:16 UTCPublished CVE record published
2026-10-25 17:10 UTCUpdated Record last modified

microsoft edge chromium UPGRADE

Affected: < 150.0.4078.50

Fixed in: 150.0.4078.50

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 150.0.4078.50 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade edge-chromium

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-2026-58525?

edge chromium: upgrade to 150.0.4078.50. Exact commands for each OS are on this page.

Is CVE-2026-58525 being exploited?

CVE-2026-58525 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-2026-58525 affect?

CVE-2026-58525 affects edge chromium. Severity is high (CVSS 8.2). Improper access control in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.

How urgent is CVE-2026-58525?

Priority 45/100. High severity; On your watchlist

Software pages

Microsoft Edge vulnerabilities · Chromium vulnerabilities

Related CVEs

CVE-2026-50521 HIGH 8.3 UPGRADE Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network
CVE-2026-58289 CRITICAL 9.0 UPGRADE Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an una
CVE-2026-57983 HIGH 8.7 UPGRADE Improper authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security
CVE-2026-58293 HIGH 8.1 UPGRADE External control of file name or path in Microsoft Edge (Chromium-based) allows an unauthorized attacker to ex
CVE-2026-56645 HIGH 8.8 UPGRADE Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code

References

← Back to latest CVEs