Unauthenticated security bypass via improper certificate validation
Published Jul 14, 2026 · Updated Jul 14, 2026
Improper certificate validation in Microsoft Windows Cryptographic Services allows remote attackers to bypass a security feature over a network. Microsoft has not published which certificate-validation path accepts an invalid certificate or what trust decision is bypassed. Exploitation requires user interaction, and the public record does not identify the attacker-controlled input, affected protocol, or resulting trust decision.
Summary
What happened
Improper certificate validation in Microsoft Windows Cryptographic Services allows remote attackers to bypass a security feature over a network. Microsoft has not published which certificate-validation path accepts an invalid certificate or what trust decision is bypassed. Exploitation requires user interaction, and the public record does not identify the attacker-controlled input, affected protocol, or resulting trust decision.
The record
- CVE
- CVE-2026-50302
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-295
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26100.0 <10.0.26100.33158
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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