Security readout for executives and security teams
Plain-English summary
Microsoft ACI Confidential Containers 1.0.0 may store sensitive information unencrypted in Azure Compute Gallery. An attacker who already has authorized, low-privilege access could retrieve that information remotely. The primary business risk is exposure of confidential data; the supplied evidence indicates no integrity or availability impact.
Executive priority
Prioritize timely remediation where version 1.0.0 stores credentials, keys, regulated data, or customer information. Treat internet-facing identity compromise and broad gallery permissions as urgency multipliers. Immediate emergency response is not supported by the supplied exploitation evidence.
Technical view
CVE-2026-23655 is a CWE-312 cleartext-storage vulnerability affecting Microsoft ACI Confidential Containers 1.0.0. CVSS 3.1 is 6.5: network-accessible, low complexity, low privileges, no user interaction, with high confidentiality impact only. The source bundle does not identify what information is exposed or the exact affected configuration.
Likely exposure
Exposure is limited to environments using Microsoft ACI Confidential Containers 1.0.0 with sensitive information stored through Azure Compute Gallery. Exploitation requires authorized low-privilege access, reducing broad external risk but increasing concern about compromised accounts, insiders, and excessive permissions.
Exploitation context
The supplied record does not support active exploitation. The CVE is not listed as KEV, and the CVSS exploit-maturity metric is unproven. This does not establish that exploitation is impossible or absent; no additional telemetry or incident evidence was provided.
Researcher notes
The record specifies cleartext storage, network reachability, low privileges, and high confidentiality impact. It does not document the exposed data type, storage path, tenant boundaries, detection indicators, or fixed version. Validation should remain defensive and configuration-focused until Microsoft’s advisory supplies those details.
Mitigation direction
- Identify deployments running Microsoft ACI Confidential Containers 1.0.0.
- Review Microsoft’s advisory for the supported update or remediation instructions.
- Apply Microsoft’s official remediation according to change-management requirements.
- Restrict Azure Compute Gallery access to necessary identities while remediation is pending.
- Rotate potentially exposed secrets if review indicates sensitive information was accessible.
Validation and detection
- Inventory ACI Confidential Containers versions and confirm whether 1.0.0 is present.
- Review Azure Compute Gallery permissions for unnecessary low-privilege access.
- Determine what sensitive information affected deployments stored in the gallery.
- Confirm Microsoft’s recommended remediation is applied to every affected deployment.
- Review relevant access logs for unexpected retrieval by authorized identities.
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-312: 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-2026-23655 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.
Cleartext Storage of Sensitive Information
Cleartext Storage of Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.