Security readout for executives and security teams
Plain-English summary
This critical flaw could let an unauthenticated network attacker gain elevated control in affected Azure App Service environments. Successful exploitation could expose confidential information and permit unauthorized changes. The supplied data does not identify affected versions, so organizations must use Microsoft’s advisory to determine exposure.
Executive priority
Treat as an immediate remediation priority because unauthenticated network exploitation could compromise sensitive data and administrative integrity. Assign ownership now, establish deployment exposure, follow Microsoft’s update guidance, and verify completion. Active exploitation is not established by the supplied evidence.
Technical view
CVE-2026-58630 is an improper access-control vulnerability (CWE-284) affecting Azure App Service. Its CVSS 3.1 score is 10.0, reflecting network access, low complexity, no required privileges or user interaction, changed scope, and high confidentiality and integrity impact. The supplied affected-product and title details differ, leaving exact deployment scope unclear.
Likely exposure
Potential exposure exists where Azure App Service is deployed on Azure Stack Hub, while the affected-product record separately names Azure App Service for Linux. No affected versions or CPEs are supplied. Inventory both characteristics and confirm exact affected builds through Microsoft’s advisory.
Exploitation context
The CVSS vector indicates a remote, unauthenticated attack path requiring neither user interaction nor elevated starting privileges. However, the CVE is not listed in KEV, and the supplied sources provide no evidence of active exploitation or public exploit availability.
Researcher notes
The record reports improper access control and privilege elevation over a network but provides no vulnerable component, version range, or technical root-cause detail. The title references Azure Stack Hub, while the affected entry names Azure App Service for Linux. Avoid assuming broader Azure App Service exposure until Microsoft clarifies product and build scope.
Mitigation direction
- Review Microsoft’s advisory for exact affected builds and update requirements.
- Apply the Microsoft-provided update to every confirmed affected deployment.
- Until updated, restrict network reachability to trusted paths where operationally feasible.
- Monitor affected environments for unexpected privilege or configuration changes.
Validation and detection
- Inventory Azure Stack Hub deployments running Azure App Service, including Linux instances.
- Compare deployed builds with Microsoft’s current affected-product information.
- Confirm Microsoft’s required update is installed across every affected instance.
- Review available audit logs for unexplained privilege or administrative changes.
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-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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-58630 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
- 10 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C3.95.8microsoftVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
- Azure App Service on Azure Stack Hub Elevation of Privilege 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.