What is CVE-2026-32157?
CVE-2026-32157 is a critical remote code execution vulnerability in Microsoft Active Directory Domain Services, disclosed as part of the April 2026 Patch Tuesday addressing 167 vulnerabilities. An authenticated attacker with low privileges can write arbitrary LDAP attributes leading to domain controller code execution (CVSS 9.0). This vulnerability is part of a massive patch release that includes two zero-days (CVE-2026-32201 SharePoint spoofing actively exploited, CVE-2026-33825 Defender EoP publicly disclosed), a wormable Windows TCP/IP IPv6 RCE (CVE-2026-23666, CVSS 9.8), and six additional Critical RCE flaws across Word, .NET, Remote Desktop, IKE Extensions, Office/Outlook, and SharePoint Server. The AD DS vulnerability is particularly dangerous in enterprise environments as it enables direct compromise of domain controllers from any authenticated domain user.
The record classifies CVE-2026-32157 under weakness class CWE-20. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 10 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 197 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - EPSS (FIRST)
- 0.8% probability of exploitation in the next 30 days, higher than 55.9% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 6.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-04-14, last modified 2026-09-25
Is CVE-2026-32157 being exploited?
It currently carries a trending score of 19 in the Threadlinqs vulnerability feed.
Affected products and versions
- Microsoft: Remote Desktop Client, 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
How to fix CVE-2026-32157
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32157. 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-2026-32157
2 tracked threats in the Threadlinqs corpus reference CVE-2026-32157, either in the campaign’s CVE list or as an indicator on the campaign record.
- Microsoft April 2026 Patch Tuesday — 163 CVEs / 88 Advisories (CVE-2026-32201 SharePoint Zero-Day Exploited In-The-Wild, CVE-2026-33825 Defender EoP Public PoC, CVE-2026-33824 IKE RCE CVSS 9.8, CVE-2026-33827 TCP/IP Wormable RCE) — CRITICAL · 2026-04-19
- Microsoft April 2026 Patch Tuesday — 167 Flaws, 2 Zero-Days (SharePoint Spoofing CVE-2026-32201 + Defender EoP CVE-2026-33825) — CRITICAL · 2026-04-14
Sources
Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on .