CVE-2026-62757
MEDIUMCVSS 5.3/10EPSS 0.25%
Last modified
CVE-2026-62757 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Improper verification of cryptographic signature in Windows Schannel allows an unauthorized attacker to bypass a security feature over a network.. EPSS estimates a 0.25% chance of exploitation in the next 30 days.
Description
Improper verification of cryptographic signature in Windows Schannel allows an unauthorized attacker to bypass a security feature over a network.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | >= 10.0.14393.0, < 10.0.14393.9418 |
| Microsoft | Windows 10 Version 1809 | >= 10.0.17763.0, < 10.0.17763.9115 |
| Microsoft | Windows 10 Version 21H2 | >= 10.0.19044.0, < 10.0.19044.7663 |
| Microsoft | Windows 10 Version 22H2 | >= 10.0.19045.0, < 10.0.19045.7663 |
| Microsoft | Windows 11 version 23H2 | >= 10.0.22631.0, < 10.0.22631.7517 |
| Microsoft | Windows 11 Version 23H2 | >= 10.0.22631.0, < 10.0.22631.7517 |
| Microsoft | Windows 11 Version 24H2 | >= 10.0.26100.0, < 10.0.26100.9168 |
| Microsoft | Windows 11 Version 25H2 | >= 10.0.26200.0, < 10.0.26200.9168 |
| Microsoft | Windows 11 version 26H1 | >= 10.0.28000.0, < 10.0.28000.2704 |
| Microsoft | Windows Server 2012 | >= 6.2.9200.0, < 6.2.9200.26280 |
| Microsoft | Windows Server 2012 (Server Core installation) | >= 6.2.9200.0, < 6.2.9200.26280 |
| Microsoft | Windows Server 2012 R2 | >= 6.3.9600.0, < 6.3.9600.23338 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | >= 6.3.9600.0, < 6.3.9600.23338 |
| Microsoft | Windows Server 2016 | >= 10.0.14393.0, < 10.0.14393.9418 |
| Microsoft | Windows Server 2016 (Server Core installation) | >= 10.0.14393.0, < 10.0.14393.9418 |
| Microsoft | Windows Server 2019 | >= 10.0.17763.0, < 10.0.17763.9115 |
| Microsoft | Windows Server 2019 (Server Core installation) | >= 10.0.17763.0, < 10.0.17763.9115 |
| Microsoft | Windows Server 2022 | >= 10.0.20348.0, < 10.0.20348.5499 |
| Microsoft | Windows Server 2025 | >= 10.0.26100.0, < 10.0.26100.33296 |
| Microsoft | Windows Server 2025 (Server Core installation) | >= 10.0.26100.0, < 10.0.26100.33296 |
References
Timeline
- Published
- Last Modified
- Status
- Undergoing Analysis
Frequently Asked Questions
What is CVE-2026-62757?
Improper verification of cryptographic signature in Windows Schannel allows an unauthorized attacker to bypass a security feature over a network.
How severe is CVE-2026-62757?
CVE-2026-62757 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.
How do I fix CVE-2026-62757?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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Are you affected by CVE-2026-62757?
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Scan your code nowSource: NVD / NIST