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CVE-2026-42903

🔶 medium
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Summary

Null pointer dereference in Windows Kerberos allows an authorized attacker to deny service over a network.

CVSS Score
6.5
Medium
EPSS Score
0.7
Exploit Probability
Published Date
2026-06-09
First Seen: 2026-06-10
📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 47.8% of all 328,009 vulnerabilities in our database.

#171,192
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Jun 10, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Partial
Limited system impact
SSVC data provided by CISA
Last Modified 2026-06-11
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE IDs (Weakness Types)
CWE-476

📦 Affected Products 14

Vendor Product Status Affected Versions
microsoft windows_server_2012 Affected
v-
microsoft windows_server_2012 Affected
vr2
microsoft windows_server_2016 Affected
< 10.0.14393.9234
microsoft windows_server_2019 Affected
< 10.0.17763.8880
microsoft windows_server_2022 Affected
< 10.0.20348.5256
microsoft windows_10_1809 Affected
< 10.0.17763.8880
microsoft windows_10_21h2 Affected
< 10.0.19044.7417
microsoft windows_10_22h2 Affected
< 10.0.19045.7417
microsoft windows_10_1607 Affected
< 10.0.14393.9234
microsoft windows_11_23h2 Affected
< 10.0.22631.7219
microsoft windows_11_24h2 Affected
< 10.0.26100.8655
microsoft windows_server_2025 Affected
< 10.0.26100.32995
microsoft windows_11_25h2 Affected
< 10.0.26200.8655
microsoft windows_11_26h1 Affected
< 10.0.28000.2269

🔗 References 1

https://msrc.microsoft.com/update-guide/vulnerabilit...
Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-34335 ⚠️ high 7.0 0.2 Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges loca... 2026-06-09
CVE-2026-40404 ⚠️ high 7.8 0.3 Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability 2026-06-09
CVE-2026-40409 ⚠️ high 7.8 0.2 Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability 2026-06-09
CVE-2026-41092 ⚠️ high 7.8 0.3 Improper access control in Microsoft Kinect allows an authorized attacker to elevate privileges locally. 2026-06-09
CVE-2026-41108 ⚠️ high 7.0 0.2 Heap-based buffer overflow in Microsoft Windows DNS allows an authorized attacker to elevate privileges locally. 2026-06-09
CVE-2026-42836 ⚠️ high 7.0 0.2 Concurrent execution using shared resource with improper synchronization ('race condition') in Function Discovery Servic... 2026-06-09
These CVEs affect the same products