Security readout for executives and security teams
Plain-English summary
CVE-2026-42832 is a high-severity Microsoft Office flaw that can let an unauthorized local attacker spoof trusted information and compromise confidentiality and integrity. The supplied record lists specific Android Excel and Word releases and Office LTSC for Mac editions. Availability is not affected according to the CVSS vector.
Executive priority
Treat this as a high-priority endpoint remediation issue because exploitation could compromise sensitive information and document integrity without privileges or user interaction. Prioritize confirmed affected devices, while recognizing that the required local access reduces exposure compared with a remotely exploitable flaw.
Technical view
The vulnerability is an improper access-control issue, classified as CWE-284. Its CVSS 3.1 score is 7.7 with local access, low complexity, no privileges, and no user interaction required. Successful exploitation may cause high confidentiality and integrity impact without availability impact. The supplied sources provide no further attack-path detail.
Likely exposure
Exposure is limited by the local attack vector but potentially serious on affected endpoints. The bundle lists Excel for Android 16.0.0.0, Word for Android 16.0.0.0, Office LTSC for Mac 2021 version 16.0.1, and Office LTSC for Mac 2024 version 16.0.0.
Exploitation context
The CVSS vector describes local exploitation requiring no privileges or user interaction. The supplied bundle states that this CVE is not in CISA KEV, and no cited source establishes active exploitation. Absence from KEV does not prove exploitation has never occurred.
Researcher notes
Public details in the supplied bundle are limited to improper access control, local spoofing, affected products, and CVSS characteristics. No exploit mechanism, indicators of compromise, or named fixed builds are provided. Testing should remain non-destructive and follow Microsoft’s advisory as it evolves.
Mitigation direction
- Review Microsoft’s advisory for applicable security updates and deployment instructions.
- Prioritize updates for endpoints running the listed Office products and versions.
- Restrict local access to affected devices until remediation is confirmed.
- Monitor Microsoft guidance for revised affected-version or mitigation information.
Validation and detection
- Inventory Android and Mac endpoints for the listed Office products and versions.
- Compare installed builds with Microsoft’s current advisory and update guidance.
- Confirm applicable Microsoft security updates are installed successfully.
- Review endpoint telemetry for suspicious local access or unexpected Office-related changes.
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 lookupCVE-2026-42832 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
- 7.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.
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:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C2.55.2microsoftVulnerability scoring details
Base CVSS 3.1 score
7.7HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/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 Office Spoofing 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 Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.