CVE-2026-77494
HIGHCVSS 7.5/10EPSS 1.20%
Last modified
CVE-2026-77494 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Access of resource using incompatible type ('type confusion') in Windows DHCP Server allows an unauthorized attacker to deny service over a network.. EPSS estimates a 1.20% chance of exploitation in the next 30 days.
Description
Access of resource using incompatible type ('type confusion') in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 1607 | < 10.0.14393.9512 |
| Microsoft | Windows 10 1809 | < 10.0.17763.9245 |
| Microsoft | Windows Server 2012 | All versions |
| Microsoft | Windows Server 2012 | r2 |
| Microsoft | Windows Server 2016 | < 10.0.14393.9512 |
| Microsoft | Windows Server 2019 | < 10.0.17763.9245 |
| Microsoft | Windows Server 2022 | < 10.0.20348.5622 |
| Microsoft | Windows Server 2025 | < 10.0.26100.33438 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77494Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-77494?
Access of resource using incompatible type ('type confusion') in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
How severe is CVE-2026-77494?
CVE-2026-77494 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.
How do I fix CVE-2026-77494?
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-2026-77489Null pointer dereference in Windows Biometric Service allows…7.8
- CVE-2026-7749A security vulnerability has been detected in Totolink N300R…8.8
- CVE-2026-77490Improper neutralization of input during web page generation …6.1
- CVE-2026-77491Out-of-bounds read in Windows GDI allows an unauthorized att…5.5
- CVE-2026-77492Out-of-bounds read in Storage Port Driver allows an authoriz…5.5
- CVE-2026-77493Double free in Microsoft Graphics Component allows an unauth…9.8
- CVE-2026-77495Heap-based buffer overflow in Windows Imaging Component allo…8.8
- CVE-2026-77498Out-of-bounds read in Windows DHCP Server allows an unauthor…7.5
- CVE-2026-77499Access of resource using incompatible type ('type confusion'…7.5
- CVE-2026-7750A vulnerability was detected in Totolink N300RH 3.2.4-B20220…8.8
- CVE-2026-77500Release of invalid pointer or reference in Windows Device As…7.8
- CVE-2026-77501Out-of-bounds read in Windows DHCP Server allows an unauthor…7.5
Are you affected by CVE-2026-77494?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST