Windows Web Proxy Auto-Discovery Protocol (WPAD)
CVE-2026-50480 — Windows Web Proxy Auto-Discovery Protocol (WPAD) Elevation of Privilege Vulnerability
Executive Summary
Heap-based buffer overflow in Windows Web Proxy Auto-Discovery Protocol (WPAD) allows an authorized attacker to elevate privileges locally.
Overview
7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.8
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
4 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 Version 1607 for 32-bit Systems | 5099535 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1607 for x64-based Systems | 5099535 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2012 5099445 (Monthly Rollup) 5099415 (IE Cumulative) Important Elevation of Privilege 5094042 5099415 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.26226 1.000 Yes None Windows Server 2012 (Server Core installation) 5099445 (Monthly Rollup) 5099415 (IE Cumulative) Important Elevation of Privilege 5094042 5099415 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.26226 1.000 Yes None Windows Server 2012 R2 5099415 (IE Cumulative) 5099444 (Monthly Rollup) Important Elevation of Privilege 5099415 5094041 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 1.000 6.3.9600.23291 Yes None Windows Server 2012 R2 (Server Core installation) 5099415 (IE Cumulative) 5099444 (Monthly Rollup) Important Elevation of Privilege 5099415 5094041 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 1.000 6.3.9600.23291 Yes None Windows Server 2016 | 5099535 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2016 (Server Core installation) | 5099535 (Security Update) |
Important | Elevation of Privilege | Yes |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
5099535 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Rutuja Shirali with Microsoft
References
On This Page