ZDI lists November 2026 Microsoft fixes, one Outlook bug exploited
CVE-2026-124194 is the only listed flaw marked exploited; it is a Moderate CVSS 6.5 spoofing bug.
74
CVE-2026-120789
Heap buffer overflow in Microsoft Excel via crafted file
- CVSS 3.1
- 8.8 high
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
A heap-based buffer overflow in Microsoft Office Excel lets an unauthorized attacker run code. The flaw is reachable over a network without prior privileges, but the victim must interact (typically by opening a crafted file). Successful exploitation can fully compromise confidentiality, integrity, and availability of the affected Excel user. Microsoft has not listed affected builds.
What to do: Apply Microsoft's update for CVE-2026-120789. No workaround is stated.
| Product | Affected |
|---|---|
| Microsoft Office Excel | — |
Estimated exposure
No basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
- Weakness
- CWE-122
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H