Security readout for executives and security teams
Plain-English summary
CVE-2026-23667 is a Microsoft Windows local privilege escalation issue in Broadcast DVR. An attacker who already has authorized local access could gain higher privileges. It is important for endpoint hardening, but the provided sources do not support remote exploitation or active exploitation claims.
Executive priority
Treat this as a high-priority endpoint patching item, especially for fleets with shared user access or higher compromise likelihood. It is not supported by the provided evidence as an internet-facing emergency or known-exploited issue.
Technical view
The issue is a CWE-416 use-after-free in Broadcast DVR. Microsoft rates it high with CVSS 3.1 score 7.0, vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. Exploitation requires local access, low privileges, and high attack complexity, with no user interaction.
Likely exposure
Exposure is likely limited to Microsoft Windows 10 and Windows 11 systems listed in the source bundle, including Windows 10 1809, 21H2, 22H2 and Windows 11 22H3, 23H2, 24H2, 25H2, 26H1 builds.
Exploitation context
The bundle marks CISA KEV as false and CVSS exploit maturity as unproven. No provided source confirms public exploitation or active attacks. The realistic concern is post-compromise privilege escalation on endpoints where an attacker already has local authenticated access.
Researcher notes
The available evidence names the bug class and impact but does not include root-cause detail, vulnerable code paths, proof of concept, or component-level mitigations. Research should stay focused on patch diffing and defensive validation without assuming exploitability beyond Microsoft’s scoring.
Mitigation direction
- Apply the Microsoft security update referenced by MSRC.
- Use Microsoft guidance to identify the correct KB and fixed build.
- Prioritize shared workstations, VDI, and high-risk endpoint populations.
- Monitor MSRC and CISA KEV for changed exploitation status.
Validation and detection
- Inventory Windows 10 and Windows 11 versions against the affected list.
- Verify installed build numbers against Microsoft fixed-version guidance.
- Confirm endpoint patch compliance through management tooling.
- Review local privilege escalation detections for affected Windows hosts.
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-416: 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-23667 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
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/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.
SSVC decision data
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:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C15.9microsoftVulnerability scoring details
Base CVSS 3.1 score
7HighVector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Broadcast DVR Elevation of Privilege VulnerabilityCVE reference, microsoft · 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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.