Security readout for executives and security teams
Plain-English summary
A flaw in Microsoft Edge’s Copilot Chat could let a remote, unauthenticated attacker expose sensitive information after a user interacts with malicious content. It does not affect integrity or availability according to the supplied CVSS assessment, but the potential confidentiality impact is high.
Executive priority
Treat this as a scheduled, prompt confidentiality fix rather than an emergency. Expedite action where Copilot Chat users handle credentials, customer records, regulated data, or sensitive corporate information. Exposure cannot be quantified reliably until Microsoft’s affected-version guidance is compared with the organization’s Edge estate.
Technical view
CVE-2026-47644 is a CWE-74 injection issue involving insufficient neutralization of output consumed by a downstream component. It is network-accessible, low complexity, requires no privileges, and requires user interaction. The CVSS 3.1 score is 6.5; confidentiality impact is high, with no stated integrity or availability impact.
Likely exposure
Exposure is limited to organizations using Copilot Chat within Microsoft Edge. The source bundle does not identify affected versions, configurations, prerequisites, or data types at risk, so organizations must consult Microsoft’s advisory and inventory feature availability before determining exposure.
Exploitation context
The supplied record does not establish active exploitation, and the CVE is not listed as a CISA KEV entry in the bundle. The CVSS exploit-maturity value is unproven. This does not demonstrate that exploitation is impossible; it means no supporting evidence was provided here.
Researcher notes
The vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C. The record attributes the flaw to CWE-74 but provides no vulnerable versions, attack prerequisites beyond user interaction, disclosed data boundaries, indicators, or technical root-cause detail. Avoid inferring exploitability beyond these documented properties.
Mitigation direction
- Review Microsoft’s advisory and apply its official update or remediation for CVE-2026-47644.
- Prioritize remediation for users who access sensitive information through Edge or Copilot Chat.
- Until remediated, avoid entering or exposing sensitive information through the affected feature.
- Monitor Microsoft’s advisory for affected-version details, prerequisites, and revised guidance.
Validation and detection
- Inventory managed Edge installations where Copilot Chat is enabled or available.
- Compare installed builds and configurations with Microsoft’s affected and remediated guidance.
- Confirm the official remediation reached all applicable endpoints through endpoint-management reporting.
- Recheck the Microsoft advisory because the supplied bundle omits affected-version details.
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-74: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2026-47644 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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:U/C:H/I:N/A:N/E:U/RL:O/RC:C2.83.6microsoftVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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
- Copilot Chat (Microsoft Edge) Information Disclosure 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 in Output Used by a Downstream Component ('Injection')
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.