Security readout for executives and security teams
Plain-English summary
A logged-in attacker with local access to a vulnerable Android device could abuse weak access controls to spoof information in affected Microsoft 365 apps. The reported impact is limited disclosure and modification of data, with no availability impact. This is a moderate business risk, especially on shared, lost, or poorly managed devices.
Executive priority
Address through the normal vulnerability-management cycle, with faster handling for shared or physically exposed Android devices. The moderate score and local-access requirement reduce urgency compared with remotely exploitable flaws, but low-complexity exploitation and possible data spoofing justify timely inventory and vendor-update deployment.
Technical view
CVE-2026-41100 is a CWE-284 improper access-control flaw affecting specified Android versions of Microsoft 365 Copilot, Excel, Loop, OneNote, PowerPoint, and Word. CVSS 3.1 scores it 4.4: local access, low complexity, low privileges, no user interaction, unchanged scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to Android devices running the listed affected versions. Risk is higher where untrusted users can access unlocked, shared, or otherwise locally accessible devices. The supplied records provide no affected version ranges, package identifiers, or corrected build numbers, so organizations should confirm exact applicability with Microsoft.
Exploitation context
The attack requires local access and low privileges but no additional user interaction. The supplied bundle marks the CVE as absent from KEV and provides no evidence of active exploitation or public exploit availability. The precise spoofing scenario, prerequisites, and observable indicators are not described.
Researcher notes
The record supports access-control failure and spoofing but does not disclose the vulnerable component, trust boundary, data flow, or attack primitive. Version entries appear product-specific and should not be interpreted as complete vulnerable ranges. Exploit maturity is unproven, remediation is officially available, and report confidence is high, according to the CVSS temporal metrics.
Mitigation direction
- Review Microsoft's advisory for corrected Android app versions and deployment guidance.
- Deploy vendor-approved updates through managed Android application channels.
- Prioritize shared, high-value, and physically exposed Android devices.
- Enforce device locking and access controls while updates are pending.
Validation and detection
- Inventory installed versions of all six listed Android applications.
- Compare deployed versions with Microsoft's current affected and corrected build guidance.
- Confirm managed application updates completed across enrolled Android devices.
- Record exceptions where version applicability cannot be established from available evidence.
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-2026-41100 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
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/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:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C1.82.5microsoftVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/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 365 Copilot for Android 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.