Security readout for executives and security teams
Plain-English summary
CVE-2025-21360 is a high-severity privilege escalation issue in Microsoft AutoUpdate for Mac. It matters because a person or malware that already has low-level local access could gain much broader control of the affected Mac. The source bundle identifies Microsoft AutoUpdate for Mac 4.0.0 as affected.
Executive priority
Prioritize remediation for enterprise-managed Macs because successful exploitation could turn limited local access into full system compromise. Urgency is high, but the provided sources do not support claims of active exploitation.
Technical view
The CVSS 3.1 vector is 7.8 high: local attack, low complexity, low privileges required, no user interaction, and high confidentiality, integrity, and availability impact. The mapped weakness is CWE-269, improper privilege management. The bundle does not provide root-cause details or exploit mechanics.
Likely exposure
Exposure is most likely in Mac environments where Microsoft AutoUpdate for Mac version 4.0.0 is installed and reachable by local users or local malware.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. CVSS exploit maturity is marked unproven. Treat this as a serious local post-compromise escalation risk, not a remote entry point based on the provided evidence.
Researcher notes
Key gaps remain: the bundle does not include root-cause detail, exploit prerequisites beyond CVSS, or exact fixed version information. Validation should focus on version exposure, Microsoft advisory tracking, and confirming remediation through endpoint inventory.
Mitigation direction
- Apply Microsoft’s official update or remediation guidance for CVE-2025-21360.
- Prioritize managed Macs running Microsoft AutoUpdate for Mac 4.0.0.
- Use MDM or endpoint tooling to enforce current Microsoft AutoUpdate versions.
- Review local user access and endpoint controls on affected Macs.
Validation and detection
- Inventory Microsoft AutoUpdate for Mac versions across the Mac fleet.
- Confirm whether any systems report version 4.0.0.
- Check Microsoft’s advisory for current remediation status and affected-version details.
- Verify patched systems no longer match the affected version in asset data.
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-269: 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-2025-21360 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/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:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C1.85.9microsoftVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/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
- Microsoft AutoUpdate (MAU) 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.
Improper Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.