Microsoft Edge up to 150.0.4078.99 improper authorization

Summaryinfo

A vulnerability classified as problematic was found in Microsoft Edge. This affects an unknown part. The manipulation results in improper authorization. This vulnerability was named CVE-2026-66311. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability was found in Microsoft Edge. It has been classified as problematic. Affected is an unknown function. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.

The advisory is shared for download at msrc.microsoft.com. This vulnerability is traded as CVE-2026-66311 since 07/24/2026. The exploitability is told to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/04/2026). The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading to version 151.0.4129.59 eliminates this vulnerability.

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Productinfo

Type

• Web Browser

Vendor

• Microsoft

Name

• Edge

Version

• 3.3.2604.3097
• 11.0.10240.16384
• 38.14393.0.0
• 38.14393.1066.0
• 98.0.1108.43
• 99.0.1150.30
• 102.0.1245.39
• 102.0.1245.41
• 103.0.1264.37
• 103.0.1264.44
• 104.0.1293.47
• 118.0.2088.88
• 118.0.2088.102
• 119.0.2151.44
• 119.0.2151.58
• 119.0.2151.72
• 120.0.2210.61
• 120.0.2210.77
• 120.0.2210.133
• 120.0.2210.160
• 121.0.2277.83
• 121.0.2277.98
• 122.0.2365.52
• 122.0.2365.63
• 122.0.2365.80
• 122.0.2365.92
• 122.0.2365.120
• 123.0.2420.53
• 123.0.2420.81
• 124.0.2478.51
• 124.0.2478.97
• 124.0.2478.109
• 126.0.2592.56
• 126.0.2592.68
• 126.0.2592.81
• 126.0.2592.102
• 127.0.2651.74
• 127.0.2651.98
• 127.0.2651.105
• 128.0.2739.42
• 129.0.2792.52
• 130.0.2849.46
• 131.0.2903.48
• 131.0.2903.63
• 131.0.2903.86
• 132.0.2957.115
• 132.0.2957.118
• 133.0.3065.51
• 133.0.3065.69
• 134.0.3124.51
• 134.0.3124.66
• 134.0.3124.93
• 135.0.3179.54
• 135.0.3179.98
• 136.0.3240.50
• 138.0.3351.65
• 140.0.3485.54
• 140.0.3485.71
• 140.0.3485.81
• 142.0.3595.53
• 143.0.3650.66
• 143.0.3650.88
• 143.0.3650.97
• 144.0.3719.82
• 145.0.3800.58
• 146.0.3856.59
• 146.0.3856.84
• 147.0.3912.60
• 148.0.3967.55
• 148.0.3967.70
• 149.0.4022.68
• 150.0.4078.48
• 150.0.4078.50
• 150.0.4078.80
• 150.0.4078.99

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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