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-2026-114164
Integer underflow RCE in Windows Codecs Library
- CVSS 3.1
- 8.8 high
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
An integer underflow in the Microsoft Windows Codecs Library can let an unauthorized attacker run code. The flaw is reachable over the network with no privileges, but the victim must interact (for example, by opening crafted media). Successful exploitation yields high impact on confidentiality, integrity, and availability on affected Windows systems. Microsoft has not listed affected builds or a fixed version.
What to do: Apply Microsoft's update for CVE-2026-114164 when it is available. Microsoft has not listed a fixed version or workaround.
| Product | Affected |
|---|---|
| Microsoft Windows Codecs Library | — |
Estimated exposure
largeWindows systems worldwide; user interaction required — Codecs Library ships with Windows; network attack still needs victim interaction.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
Integer underflow (wrap or wraparound) in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code over a network.
- Weakness
- CWE-191
- 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 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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