CVE-2026-69778
HIGHCVSS 8.8/10EPSS 0.84%
Last modified
CVE-2026-69778 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.. EPSS estimates a 0.84% chance of exploitation in the next 30 days.
Description
Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | 365 Apps | All versions |
| Microsoft | Access | 2016 |
| Microsoft | Office 2016 | All versions |
| Microsoft | Office 2019 | All versions |
| Microsoft | Office 2021 | All versions |
| Microsoft | Office 2024 | All versions |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69778Vendor Advisory, Patch
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-69778?
Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.
How severe is CVE-2026-69778?
CVE-2026-69778 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.84% probability of exploitation in the next 30 days.
How do I fix CVE-2026-69778?
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-2026-69770Use of uninitialized resource in Windows Spaceport.sys allow…5.5
- CVE-2026-69771Improper link resolution before file access ('link following…4.7
- CVE-2026-69772Heap-based buffer overflow in Windows Network File System al…8.8
- CVE-2026-69773Heap-based buffer overflow in Windows Biometric Service allo…8
- CVE-2026-69775Use after free in Windows DWM Core Library allows an authori…7.1
- CVE-2026-69777Heap-based buffer overflow in Windows DHCP Client allows an …8
- CVE-2026-69779Time-of-check time-of-use (toctou) race condition in Windows…7
- CVE-2026-6978A vulnerability was detected in JiZhiCMS up to 2.5.6. The im…4.7
- CVE-2026-69781Missing release of memory after effective lifetime in Window…6.5
- CVE-2026-69782Concurrent execution using shared resource with improper syn…8.1
- CVE-2026-69784Use after free in Windows Hello allows an authorized attacke…8.8
- CVE-2026-69785Untrusted search path in Windows Smart Card allows an author…7.8
Are you affected by CVE-2026-69778?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST