November 2026 Patch Tuesday lists dozens of Microsoft flaws
The excerpt lists 57 CVEs, including CVSS 9.8 remote code execution bugs rated exploitation less likely.
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CVE-2026-100204
Use-after-free in HEIF Image Extensions (local, user interaction)
- CVSS 3.1
- 7.0 high
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
A use-after-free flaw in Microsoft HEIF Image Extensions lets an unauthorized attacker run code on a local system. Triggering it needs user interaction and is high complexity; no privileges are required. Successful exploitation can fully compromise confidentiality, integrity, and availability. Microsoft has not listed affected builds.
What to do: Apply Microsoft's update for CVE-2026-100204.
| Product | Affected |
|---|---|
| Microsoft HEIF Image Extensions | — |
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
Use after free in HEIF Image Extensions allows an unauthorized attacker to execute code locally.
- Weakness
- CWE-416
- Vector
- CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
In the news
2 storiesMicrosoft November 2026 Patch Tuesday covers dozens of Windows flaws
The visible Rapid7 list includes several 9.8 remote code execution bugs; each entry is marked not publicly disclosed.
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