vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-66323

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

MEDIUM
5.4
CVSS Score
Published: August 28, 2026 at 05:45 PM UTC
Updated: October 28, 2026 at 09:17 PM UTC
3 products affected across 1 vendorEdge ChromiumEdgeEdge IOS

Using Microsoft Edge (Chromium-based) by Microsoft?

Get instant alerts when new vulnerabilities affect Microsoft Edge (Chromium-based) - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.4
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Improper neutralization of parameter/argument delimiters in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Edge Chromium· Microsoft
95%
v < 152.0.4191.531.0.01.0.0.0
Affected range stops below 152.0.4191.52, so it looks safe — our inference, not a vendor statement
Affected range stops below 152.0.4191.53, so it looks safe — our inference, not a vendor statement
Edge· Microsoft
90%
1.0.0.0
Affected range stops below 152.0.4191.52, so it looks safe — our inference, not a vendor statement
Edge IOS· Microsoft
90%
1.0.0.0
Affected range stops below 152.0.4191.52, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66323

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-141

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card