What is CVE-2026-24294?
Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.
The record classifies CVE-2026-24294 under weakness class CWE-287. 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. 25 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 235 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 - EPSS (FIRST)
- 4.8% probability of exploitation in the next 30 days, higher than 91.8% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 9.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-03-10, last modified 2026-07-01
Is CVE-2026-24294 being exploited?
Weaponised exploit code for CVE-2026-24294 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 41 in the Threadlinqs vulnerability feed.
- 0xNDI/CVE-2026-24294 (github)
- trickest/cve (trickest)
Affected products and versions
- Microsoft: Windows 10 1607, Windows 10 1809, Windows 10 21h2, Windows 10 22h2, Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2012, Windows Server 2012 r2, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2022 23h2, Windows Server 2025
Showing 15 of 25 recorded product entries.
How to fix CVE-2026-24294
The record marks a vendor fix as available for CVE-2026-24294. Patch reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24294. Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24294. 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-2026-24294
3 tracked threats in the Threadlinqs corpus reference CVE-2026-24294, either in the campaign’s CVE list or as an indicator on the campaign record.
- Windows Authentication Reflection Mitigation Bypasses for SYSTEM Shells via Kerberos Unicode Coercion (CVE-2025-33073, CVE-2026-24294, CVE-2025-58726, CVE-2026-26128) — HIGH · 2026-10-31
- CVE-2026-24294: NTLM Reflection Bypass via SMB on Arbitrary TCP Ports — Local Privilege Escalation to SYSTEM — CRITICAL · 2026-06-30
- Microsoft Office RCE via Preview Pane (CVE-2026-26110, CVE-2026-26113) — March 2026 Patch Tuesday — CRITICAL · 2026-03-11
Sources
Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on .