CVE-2026-83867
HIGHCVSS 7.8/10EPSS 0.37%
Last modified
CVE-2026-83867 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Heap-based buffer overflow in Windows Push Notifications allows an authorized attacker to elevate privileges locally.. EPSS estimates a 0.37% chance of exploitation in the next 30 days.
Description
Heap-based buffer overflow in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 1607 | < 10.0.14393.9612 |
| Microsoft | Windows 10 1809 | < 10.0.17763.9376 |
| Microsoft | Windows 10 21h2 | < 10.0.19044.7807 |
| Microsoft | Windows 10 22h2 | < 10.0.19045.7807 |
| Microsoft | Windows 11 23h2 | < 10.0.22631.7652 |
| Microsoft | Windows 11 24h2 | < 10.0.26100.9711 |
| Microsoft | Windows 11 25h2 | < 10.0.26200.9711 |
| Microsoft | Windows 11 26h1 | < 10.0.28000.3231 |
| Microsoft | Windows 11 26h2 | < 10.0.26300.9711 |
| Microsoft | Windows Server 2016 | < 10.0.14393.9612 |
| Microsoft | Windows Server 2019 | < 10.0.17763.9376 |
| Microsoft | Windows Server 2022 | < 10.0.20348.5761 |
| Microsoft | Windows Server 2025 | < 10.0.26100.33650 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83867Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-83867?
Heap-based buffer overflow in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-83867?
CVE-2026-83867 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.
How do I fix CVE-2026-83867?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-83861Heap-based buffer overflow in Windows Remote Desktop Protoco…7.8
- CVE-2026-83862Use after free in Windows Network Load Balancing allows an u…8.8
- CVE-2026-83863Heap-based buffer overflow in Servicing Stack Updates allows…7.8
- CVE-2026-83864Improper access control in Windows NTFS allows an authorized…5.5
- CVE-2026-83865Relative path traversal in Windows Internet (wininet.dll) al…4.7
- CVE-2026-83866Use after free in Windows Win32K allows an authorized attack…7
- CVE-2026-83868Concurrent execution using shared resource with improper syn…7
- CVE-2026-83869Integer underflow (wrap or wraparound) in DNS Server allows …9.8
- CVE-2026-8387A vulnerability in allegroai/clearml versions up to and incl…2.4
- CVE-2026-83870Out-of-bounds read in Windows Aggregated Data Platform Servi…5.5
- CVE-2026-83871Heap-based buffer overflow in OpenSSH for Windows allows an …7
- CVE-2026-83872Incorrect conversion between numeric types in Windows TCP/IP…7.8
Are you affected by CVE-2026-83867?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST