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-2026-118297
Heap buffer overflow in Microsoft Office Excel
- 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 the network without prior privileges, but the victim must interact, such as by opening crafted content. Successful exploitation gives the attacker high impact on confidentiality, integrity, and availability of the affected Excel user.
What to do: Apply Microsoft's update for CVE-2026-118297. 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