CVE-2026-78439
HIGHCVSS 8.8/10EPSS 0.62%
Last modified
CVE-2026-78439 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Stack-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.. EPSS estimates a 0.62% chance of exploitation in the next 30 days.
Description
Stack-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Office 365 for Mac | >= 1.0.0, < 16.113.26091433 |
| Microsoft | Microsoft Office for Android | >= 16.0.1, < 16.0.20430.20000 |
| Microsoft | Microsoft Office LTSC for Mac 2021 | >= 16.0.1, < 16.113.26091433 |
| Microsoft | Microsoft Office LTSC for Mac 2024 | >= 16.0.0, < 16.113.26091433 |
References
Timeline
- Published
- Last Modified
- Status
- Undergoing Analysis
Frequently Asked Questions
What is CVE-2026-78439?
Stack-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.
How severe is CVE-2026-78439?
CVE-2026-78439 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.
How do I fix CVE-2026-78439?
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-2026-78428For users authenticated through SAML or OpenID Connect (OIDC…8
- CVE-2026-78430A vulnerability was detected in sworddut mcp-ffmpeg-helper 0…5.3
- CVE-2026-78434A flaw has been found in Faveo Helpdesk up to 2.0.3. This im…6.5
- CVE-2026-78435A vulnerability has been found in Faveo Helpdesk up to 2.0.3…3.8
- CVE-2026-78437Incomplete cleanup vulnerability in Apache Tomcat allows a m…7.3
- CVE-2026-78438The W3 Total Cache plugin for WordPress is vulnerable to Sto…7.2
- CVE-2026-7844A vulnerability was detected in chatchat-space Langchain-Cha…6.3
- CVE-2026-78441Out-of-bounds read in Windows OLE DB allows an unauthorized …6.5
- CVE-2026-78442Heap-based buffer overflow in Windows OLE DB allows an unaut…8.8
- CVE-2026-78444Untrusted pointer dereference in Windows Failover Cluster al…8.1
- CVE-2026-78445Use after free in Windows Services for NFS ONCRPC XDR Driver…9.8
- CVE-2026-78446Use after free in Windows Distributed File System (DFS) allo…5.3
Are you affected by CVE-2026-78439?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST