CVE-2026-50302: Improper certificate validation in Windows Cryptographic Services allows an unauthorized attacker to bypass a security feature over a network.

mediumCVSS 4.2CVE-2026-50302

Improper certificate validation in Windows Cryptographic Services allows an unauthorized attacker to bypass a security feature over a network.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 4.2
Published: 2026-07-14
Last updated: 2026-07-16
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-50302

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-503020.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50302	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownexploitedNCSC-2026-0231 [1.00] [M/H] Vulnerabilities fixed in Microsoft Windowsncsc-nl
mediumCVE-2026-50302: Windows Cryptographic Services Security Feature Bypass Vulnerabilitymsrc

Recent advisories for Improper certificate validation

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-67294: FreeRDP before 3.29.0 improperly validates the Extended Key Usage (EKU) purpose of the peer ce…nvd · 2026-08-01
mediumCVE-2026-67293: FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains an improper certificate hostname …nvd · 2026-08-01
highCVE-2026-8497: Improper certificate validation in the Devolutions Server connection handling in Devolutions Pa…nvd · 2026-07-29
mediumCVE-2026-18257: Improper validity period check for root issuer certificate in CycloneCrypto cryptographic wrap…nvd · 2026-07-29
mediumCVE-2026-16107: IBM TS4500 CLI tool Versions: 0.1.31 through 1.12.0.0 does not validate or improperly validate…nvd · 2026-07-28
mediumCVE-2026-66053: Improper Validation of Certificate with Host Mismatch vulnerability in Apache Thrift Python bi…nvd · 2026-07-27