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-2026-110043
Heap buffer overflow in Microsoft Outlook via network
- CVSS 3.1
- 8.8 high
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
A heap-based buffer overflow in Microsoft Office Outlook lets an unauthorized attacker run code over the network. No privileges are required, but the victim must interact with attacker-controlled content. Successful exploitation can fully compromise confidentiality, integrity, and availability on the affected system. Microsoft has not listed affected builds or fixed versions.
What to do: Apply Microsoft's update for CVE-2026-110043. No workaround is stated.
| Product | Affected |
|---|---|
| Microsoft Office Outlook | — |
Estimated exposure
largeWidespread Outlook users; interaction required — Outlook is widely deployed; network attack still needs user interaction, which caps reach.
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 Outlook 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
In the news
2 storiesMicrosoft November 2026 update fixes 1,093 flaws, one Outlook zero-day
Opening a crafted file can leak an NTLMv2 hash; the Preview Pane is not an attack vector.
74