Security readout for executives and security teams
Plain-English summary
CVE-2025-21405 is a high-severity Microsoft Visual Studio elevation-of-privilege issue. It matters mainly where Visual Studio 2022 version 17.12.0 is installed on developer machines or build hosts. The provided data does not show known active exploitation.
Executive priority
Schedule remediation in the next standard high-severity patch cycle, faster for shared build systems or developer machines handling sensitive code. The business risk is local privilege escalation on development assets, not confirmed internet-scale exploitation.
Technical view
The issue is classified as CWE-284 improper access control in Microsoft Visual Studio 2022 version 17.12.0. CVSS 3.1 score is 7.3 with local access, low complexity, low privileges, and user interaction required, with high confidentiality, integrity, and availability impact.
Likely exposure
Likely exposure is limited to systems running Microsoft Visual Studio 2022 version 17.12.0, especially developer workstations and build environments. The CVSS vector indicates local access and user interaction are required; the sources do not support remote unauthenticated exposure.
Exploitation context
The source bundle marks CISA KEV as false, and the CVSS vector lists exploit code maturity as unproven. Based on the provided evidence, active exploitation is not established. Treat exploitation details as incomplete unless Microsoft or another cited source updates the record.
Researcher notes
Key constraints are AV:L, PR:L, and UI:R, with unchanged scope and high C/I/A impact. Public source details do not describe the vulnerable code path, exploit primitives, or workaround. Avoid assuming affected Visual Studio versions beyond 2022 version 17.12.0.
Mitigation direction
- Apply Microsoft’s update or patch guidance from the MSRC advisory.
- Prioritize Visual Studio 2022 version 17.12.0 on developer and build systems.
- Restrict local interactive access to developer workstations where possible.
- Monitor Microsoft guidance for superseding updates or revised affected-version details.
Validation and detection
- Inventory endpoints and build hosts for Visual Studio 2022 version 17.12.0.
- Compare installed Visual Studio versions against the MSRC advisory status.
- Confirm patch deployment through endpoint management or software inventory tooling.
- Review privileged-access logs for unusual local elevation activity on affected systems.
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-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2025-21405 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C1.35.9microsoftVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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
- Visual Studio 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.