Security readout for executives and security teams
Plain-English summary
A critical Microsoft 365 Copilot for iOS flaw could let an unauthenticated remote attacker manipulate command handling after user interaction. Successful exploitation could expose sensitive information and alter data across a security boundary. The supplied sources do not identify affected version ranges or document confirmed exploitation.
Executive priority
Treat this as an urgent remediation item because exploitation could compromise sensitive data without attacker authentication. User interaction reduces immediacy, and active exploitation is unconfirmed, but the critical score and potential cross-boundary impact justify rapid inventory, vendor-guidance review, and controlled updating.
Technical view
CVE-2026-41090 is a CWE-77 command-injection vulnerability caused by improper neutralization of command elements. Its CVSS 3.1 score is 9.3: network-accessible, low complexity, no privileges required, user interaction required, and scope changed. Confidentiality and integrity impacts are rated high; availability impact is rated none.
Likely exposure
Exposure is indicated for organizations using Microsoft 365 Copilot for iOS. The bundle provides no affected or fixed version numbers, so installation status alone cannot confirm vulnerability. Inventory deployed iOS instances and compare their versions and update state with the current Microsoft advisory.
Exploitation context
The attack is remotely reachable and requires no prior privileges, but does require user interaction. KEV status is false, and the CVSS exploit-maturity metric is unproven. No supplied source confirms active exploitation or publicly available exploit code.
Researcher notes
The available record identifies command injection but does not describe the vulnerable command path, required user action, affected versions, fixed versions, or detection indicators. Avoid assuming other Copilot platforms are affected. Confirm technical boundaries and remediation details directly from Microsoft before testing or exposure classification.
Mitigation direction
- Review Microsoft's CVE advisory for affected and fixed version information.
- Apply Microsoft's prescribed update or mitigation through managed iOS deployment controls.
- Prioritize devices handling sensitive Microsoft 365 information.
- Restrict or suspend affected Copilot use if Microsoft guidance cannot be implemented promptly.
Validation and detection
- Inventory Microsoft 365 Copilot for iOS installations and installed versions.
- Compare each installed version with Microsoft's current CVE advisory.
- Confirm managed devices received and retained the prescribed update.
- Review relevant telemetry for unexpected Copilot-driven data access or modification.
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-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-41090 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
- Critical
- CVSS
- 9.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C2.85.8microsoftVulnerability scoring details
Base CVSS 3.1 score
9.3CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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 Copilot Tampering 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 Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.