Security readout for executives and security teams
Plain-English summary
CVE-2025-26633 is a Microsoft Management Console security feature bypass affecting many Windows client and server versions. It needs local execution and user interaction, but CISA KEV listing indicates known exploitation. Treat it as urgent for managed Windows fleets, especially administrator workstations and servers where MMC is routinely used.
Executive priority
Prioritize remediation within the organization’s KEV process. The vulnerability is not remotely exploitable by CVSS alone, but confirmed KEV status raises business urgency because attackers are known to use it in real-world activity.
Technical view
Microsoft describes improper neutralization in Microsoft Management Console allowing an unauthorized local attacker to bypass a security feature. CVSS 3.1 is 7.0 with local attack vector, high complexity, no privileges required, required user interaction, and high confidentiality, integrity, and availability impact. Microsoft lists official remediation.
Likely exposure
Exposure is broad across listed Windows 10, Windows 11, and Windows Server releases, including Server Core variants. Organizations with unpatched endpoints, administrator workstations, jump boxes, or legacy servers should assume potential exposure until patch status is confirmed.
Exploitation context
CISA KEV status supports known exploitation. The source bundle does not provide exploit details, campaign attribution, or proof that exploitation is widespread. The CVSS vector indicates exploitation is local, requires user interaction, and is high complexity.
Researcher notes
Do not assume remote exploitation from the available evidence. Focus validation on affected Windows builds, patch state, MMC exposure in administrative workflows, and whether compensating controls rely on the bypassed security feature. Public sources provided here do not include weaponization details.
Mitigation direction
- Apply Microsoft security updates for CVE-2025-26633 on affected Windows systems.
- Prioritize KEV-driven remediation for administrator workstations, servers, and high-value endpoints.
- Use Microsoft advisory guidance as the authority for supported fixes and deployment sequencing.
- Review Vicarius mitigation guidance only after validating it against internal change-control standards.
Validation and detection
- Inventory Windows versions listed in the Microsoft affected-products data.
- Confirm the Microsoft CVE-2025-26633 update is installed on exposed systems.
- Check vulnerability management tooling for CVE-2025-26633 detections and stale scan data.
- Track remediation completion separately for endpoints, servers, and Server Core installations.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-707: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-26633 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C15.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7HighVector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft Management Console Security Feature Bypass VulnerabilityCVE reference · vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26633CVE reference · government-resource
- https://www.vicarius.io/vsociety/posts/cve-2025-26633-security-feature-bypass-in-microsoft-management-console-detection-scriptCVE reference
- https://www.vicarius.io/vsociety/posts/cve-2025-26633-security-feature-bypass-in-microsoft-management-console-mitigation-scriptCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization
Improper Neutralization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.