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Vulnerability · NVD

CVE-2026-66798

CVE-2026-66798, medium severity (CVSS 4.3): 2 tracked apps concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 4.3
Exploitation: 0.8 %
Tracked apps: 2
Still exposed: 0

Published on 2026-08-28

Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Attack vector : Network No privileges required

Show raw CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS 0.79% above median percentile 54.6%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Microsoft Edge Windows winget:Microsoft.Edge

Affected ≥1.0.0.0 <152.0.4191.52 Fixed in 152.0.4191.52 Latest tracked 154.0.4258.62 patched

Observed affected builds (183)

151.0.4129.107 151.0.4129.101 151.0.4129.93 151.0.4129.86 151.0.4129.78 151.0.4129.72 151.0.4129.59 150.0.4078.105 150.0.4078.99 150.0.4078.96 150.0.4078.83 150.0.4078.65 150.0.4078.48 149.0.4022.98 149.0.4022.96 149.0.4022.80 149.0.4022.69 149.0.4022.62 149.0.4022.52 148.0.3967.96 148.0.3967.83 148.0.3967.70 148.0.3967.54 147.0.3912.98 147.0.3912.86 147.0.3912.72 147.0.3912.60 146.0.3856.117 146.0.3856.109 146.0.3856.97 +153 · see history
Microsoft Edge Android com.microsoft.emmx

Affected ≥1.0.0.0 <152.0.4191.52 Fixed in 152.0.4191.52 Latest tracked 153.0.4234.49 patched

Observed affected builds (48)

151.0.4129.101 151.0.4129.96 151.0.4129.86 151.0.4129.70 150.0.4078.96 150.0.4078.81 150.0.4078.50 149.0.4022.105 149.0.4022.80 149.0.4022.53 148.0.3967.70 148.0.3967.55 147.0.3912.87 147.0.3912.77 147.0.3912.60 146.0.3856.97 146.0.3856.85 146.0.3856.71 146.0.3856.62 145.0.3800.99 145.0.3800.85 144.0.3719.115 144.0.3719.103 143.0.3650.139 142.0.3595.107 141.0.3537.99 140.0.3485.98 135.0.3179.85 131.0.2903.134 130.0.2849.68 +18 · see history

Vulnerable CPE configurations (3)

Vendor	Product	Platform	Versions	CPE 2.3 URI
microsoft	edge iOS	iOS	≥1.0.0.0 <152.0.4191.52	cpe:2.3:a:microsoft:edge::::::iphone_os::*
microsoft	edge Android	Android	≥1.0.0.0 <152.0.4191.52	cpe:2.3:a:microsoft:edge::::::android::*
microsoft	edge Windows	Windows	≥1.0.0.0 <152.0.4191.52	cpe:2.3:a:microsoft:edge::::::windows::*

View on NVD ↗ Advisory · msrc.microsoft.com

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