Security readout for executives and security teams
Plain-English summary
This is a Windows information disclosure flaw in the Accessibility Infrastructure component ATBroker.exe. A user who already has local access could expose sensitive information. It is not described as remote code execution or privilege escalation. Business urgency is moderate: prioritize normal Windows patching, especially on shared workstations, servers, and systems handling sensitive data.
Executive priority
Schedule remediation in the next regular patch cycle, with faster handling for high-value or multi-user systems. There is no cited evidence of active exploitation, but the vulnerability can expose sensitive information to a local authorized attacker.
Technical view
CVE-2026-25186 is CWE-200 in Windows Accessibility Infrastructure (ATBroker.exe). CVSS 3.1 is 5.5: local attack vector, low complexity, low privileges required, no user interaction, high confidentiality impact, no integrity or availability impact. Microsoft lists affected Windows client and server versions and provides an update-guide advisory marked as patched.
Likely exposure
Exposure is limited to affected Windows 10, Windows 11, and Windows Server versions listed by Microsoft. An attacker needs local authorized access, so internet-facing exposure is not indicated by the provided sources.
Exploitation context
The provided data does not show active exploitation. KEV is false, and the CVSS exploit maturity is unproven. Treat this as a confidentiality risk that could support follow-on activity if sensitive local information is disclosed.
Researcher notes
Evidence is limited to the CVE record and Microsoft advisory metadata. No public exploit details, root-cause analysis, or workaround specifics are provided in the source bundle. Avoid assuming remote reachability or broader impact beyond confidentiality disclosure from local low-privileged access.
Mitigation direction
- Apply the Microsoft security update for CVE-2026-25186 through normal Windows patch management.
- Prioritize shared endpoints, servers, and systems processing sensitive data.
- Review Microsoft guidance for version-specific update requirements.
- Limit unnecessary local account access where operationally feasible.
Validation and detection
- Inventory Windows assets against the affected versions listed by Microsoft.
- Confirm the relevant Microsoft update is installed on in-scope systems.
- Check vulnerability scanner results for CVE-2026-25186 after patch deployment.
- Document exceptions and verify compensating access controls for delayed patches.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2026-25186 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/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.
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:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Windows Accessibility Infrastructure (ATBroker.exe) Information Disclosure VulnerabilityCVE reference · vendor-advisory, patch
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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.