CVE-2026-45586 — Microsoft Windows 10 Version 1607

As of 2026-06-23, CVE-2026-45586 is a HIGH-severity vulnerability in Microsoft Windows 10 Version 1607, CVSS v3.1 7.8, EPSS 3.0% (85.7th percentile). Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-45586, most recently “NightmareEclipse Coordinated Disclosure Breach Campaign: 9+ Windows Zero-Days (CVE-2026-33825, CVE-2026-41091, CVE-2026-45498, CVE-2026-45585, CVE-2026-45586) Dumped Outside Responsible Disclosure and Weaponized in Real-World Intrusions”.

Last updated: 2026-06-23

What is CVE-2026-45586?

Improper link resolution before file access ('link following') in Windows Collaborative Translation Framework allows an authorized attacker to elevate privileges locally.

The record classifies CVE-2026-45586 under weakness class CWE-59. Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 12 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 95 days ago.

Severity and exploitation probability

CVSS v3.1 base score

7.8 — HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

EPSS (FIRST)

3.0% probability of exploitation in the next 30 days, higher than 85.7% of all scored CVEs

CISA KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog

Threadlinqs priority

7.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability

Published

2026-06-09, last modified 2026-06-23

Is CVE-2026-45586 being exploited?

No public exploitation evidence for CVE-2026-45586 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-06-23. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

Affected products and versions

• Microsoft: Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2

How to fix CVE-2026-45586

No vendor patch reference has been recorded for CVE-2026-45586 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-45586

2 tracked threats in the Threadlinqs corpus reference CVE-2026-45586, either in the campaign’s CVE list or as an indicator on the campaign record.

• NightmareEclipse Coordinated Disclosure Breach Campaign: 9+ Windows Zero-Days (CVE-2026-33825, CVE-2026-41091, CVE-2026-45498, CVE-2026-45585, CVE-2026-45586) Dumped Outside Responsible Disclosure and Weaponized in Real-World Intrusions — CRITICAL · 2026-08-04
• Microsoft June 2026 Patch Tuesday — 198+ CVEs Including CVE-2026-49160 (HTTP.sys 'HTTP/2 Bomb' DoS), CVE-2026-50507 (BitLocker 'YellowKey' Bypass) and CVE-2026-45586 (Collaborative Translation Framework EoP) — HIGH · 2026-06-09

Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-06-25.

Vendor advisory and patch

• msrc.microsoft.com — vendor advisory

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