What is CVE-2026-113859?
Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over an adjacent network.
The record classifies CVE-2026-113859 under weakness class CWE-416. Its CVSS v3 base vector states that the flaw is reachable from an adjacent network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 6 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1 day ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 7.5 — HIGH
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 3.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-11-10
Is CVE-2026-113859 being exploited?
It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.
Affected products and versions
- Microsoft: Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2025, Windows Server 2025 (Server Core installation)
How to fix CVE-2026-113859
Patch reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-113859. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-113859
2 tracked threats in the Threadlinqs corpus reference CVE-2026-113859, either in the campaign’s CVE list or as an indicator on the campaign record.
- Microsoft Patch Tuesday November 2026: ~1,095 vulnerabilities, 64 critical, one exploited Outlook NTLM-leak spoofing zero-day (CVE-2026-124194) — CRITICAL · 2026-11-11
- Microsoft November 2026 Patch Tuesday: Outlook Zero-Day CVE-2026-124194 Exploited to Steal NTLM Hashes (1,235 Flaws Fixed) — HIGH · 2026-11-10
Sources
Enriched from CVE.org, NVD, GitHub Security Advisories. This product uses the NVD API but is not endorsed or certified by the NVD.