Security readout for executives and security teams
Plain-English summary
A locally authorized, low-privileged attacker could abuse how Azure Monitor Agent Metrics Extension 1.0.0 searches for required files, causing attacker-controlled content to run with higher privileges. The issue can allow unauthorized system changes, but the supplied sources do not indicate data disclosure, service disruption, or remote exploitation.
Executive priority
Treat this as a timely patching priority, especially on shared or multi-user systems. It is not an emergency comparable to a remotely exploitable or actively exploited flaw, but successful abuse could let an existing local user make privileged system changes. Prioritize exposed administrative, development, and shared-compute hosts.
Technical view
CVE-2026-42830 is a CWE-426 untrusted search path vulnerability in Azure Monitor Agent Metrics Extension 1.0.0. Exploitation requires local access and low privileges, with no user interaction. The CVSS 3.1 score is 6.5; successful exploitation changes security scope and can produce high integrity impact without identified confidentiality or availability impact.
Likely exposure
Exposure is limited to systems running Azure Monitor Agent Metrics Extension version 1.0.0. Risk is greatest where untrusted or low-privileged users can access the host and influence locations searched by the extension. The supplied evidence does not identify other affected versions, platforms, or deployment configurations.
Exploitation context
The attacker must already have authorized local access with low privileges. The vulnerability is not described as remotely exploitable. CISA KEV status is false, and the supplied sources provide no evidence of active exploitation or a public exploit. Absence from KEV does not prove exploitation is impossible.
Researcher notes
The vector is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C. Available evidence supports local privilege escalation through untrusted search-path behavior, but does not document the searched component, execution context, affected operating systems, attack artifacts, or exploitation in the wild. Consult MSRC for implementation-specific remediation details.
Mitigation direction
- Inventory systems running Azure Monitor Agent Metrics Extension 1.0.0.
- Review the Microsoft advisory and apply its vendor-provided update or remediation.
- Restrict unnecessary local access to affected hosts until remediation is verified.
- Review extension search locations and remove untrusted user write access where operationally safe.
Validation and detection
- Confirm the installed Metrics Extension version on each potentially affected system.
- Verify Microsoft’s recommended update or remediation is present.
- Check that extension search locations are not writable by low-privileged users.
- Monitor affected hosts for unexpected privileged file or configuration 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-426: 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 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-2026-42830 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:L/AC:L/PR:L/UI:N/S:C/C:N/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:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C24microsoftVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/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 Monitor Agent Metrics Extension 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.
Untrusted Search Path
Untrusted Search Path represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.