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.
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CVE-2026-124170
Heap buffer overflow in Microsoft Excel via crafted file
- CVSS 3.1
- 7.5 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 attacker reaches the flaw over a network with no prior privileges, but the user must interact with the content and the conditions are hard to meet. Successful exploitation yields high impact on confidentiality, integrity, and availability of the affected Excel process. Microsoft has not listed affected builds.
What to do: Apply Microsoft's update for CVE-2026-124170. No workaround is named.
| 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:H/PR:N/UI:R/S:U/C:H/I:H/A:H