Security readout for executives and security teams
Plain-English summary
CVE-2026-26122 is a Microsoft ACI Confidential Containers information disclosure issue tied to an insecure default in Azure Compute Gallery. An attacker already authorized in the environment could access sensitive information over the network. The CVSS score is 6.5, making this a moderate-priority confidentiality risk.
Executive priority
Treat this as a moderate confidentiality exposure. Prioritize environments handling sensitive workloads in confidential containers, especially where many identities have access to related Azure resources.
Technical view
The issue is classified as CWE-1188: initialization of a resource with an insecure default. The CVSS vector indicates network access, low complexity, low privileges required, no user interaction, unchanged scope, high confidentiality impact, and no integrity or availability impact.
Likely exposure
Exposure is most likely where Microsoft ACI Confidential Containers and Azure Compute Gallery resources are used. The source bundle does not provide affected version ranges, configuration details, or tenant-specific detection logic.
Exploitation context
The provided sources do not support active exploitation. KEV is false, and the CVSS exploit maturity value is unproven. The attacker model requires authorized access, so this is not described as unauthenticated internet exploitation.
Researcher notes
Evidence is limited to CVE metadata and Microsoft advisory references. Do not assume affected versions, exploitability beyond the CVSS model, or specific fixes beyond Microsoft guidance. The main validated impact is information disclosure, not code execution or service disruption.
Mitigation direction
- Review the Microsoft MSRC advisory for official remediation guidance.
- Apply Microsoft-provided updates or configuration guidance when available.
- Inventory use of ACI Confidential Containers and Azure Compute Gallery.
- Reduce unnecessary authorized access to affected Azure resources.
- Monitor Microsoft guidance for clarified affected configurations.
Validation and detection
- Confirm whether ACI Confidential Containers are used in the environment.
- Identify Azure Compute Gallery resources linked to those deployments.
- Check whether Microsoft remediation guidance has been applied.
- Review access permissions for low-privileged Azure identities.
- Look for unusual authenticated access to related container resources.
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-1188: 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-2026-26122 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:L/UI:N/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:L/UI:N/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:L/UI:N/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
- Microsoft ACI Confidential Containers 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.
Initialization of a Resource with an Insecure Default
Initialization of a Resource with an Insecure Default represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.