Skip to main content

Azure VM Inspector CVE-2026-110063

| EUVDEUVD-2026-108542 CRITICAL
Improper Link Resolution Before File Access (CWE-59)
2026-10-22 microsoft GHSA-pjxp-pqhh-mc2x
10.0
CVSS 3.1 · Vendor: microsoft
View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach VM Inspector over network
  2. Delivery
    Plant attacker-controlled link target
  3. Exploit
    Trigger insecure link resolution before file access
  4. Execution
    Redirect privileged file operation
  5. Impact
    Elevate privileges across security scope

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Symlink resolution safety
Exploitation Conditions

Exploitation requires the attacker to influence a link (symbolic link or junction) that the VM Inspector for Azure Virtual Machines component resolves before accessing a file, per CWE-59; the specific product feature, protocol, or configuration that exposes this link-resolution path is not described in the available sources. Per the vendor CVSS vector (PR:N/UI:N/AV:N) no authentication or user interaction is required and the attack is reachable over a network, with a scope change (S:C) indicating impact beyond the initially vulnerable component. A limiting factor to note for defenders: CWE-59 link-following conditions normally depend on the attacker being able to place or control a link on a filesystem the service accesses, which the AV:N/PR:N vector does not reconcile in the supplied data - verify reachability assumptions with Microsoft.

Impact

Signals are strongly aligned toward high priority. The vendor-assigned CVSS 3.1 base vector (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H) rates this 10.0 - network-reachable, no privileges, no user interaction, with a scope change and total confidentiality/integrity/availability impact - and the vuln.today decision label is act_now with an official fix available (RL:O) and confirmed report confidence (RC:C). However, the temporal metrics temper the urgency somewhat: E:U means exploit code is Unproven, and no EPSS score, no CISA KEV listing, and no PoC reference are present in the input, so this is not confirmed as actively exploited. The result is a maximal theoretical severity (perfect base score for a scope-changing, unauthenticated network EoP in an Azure service) paired with no evidence of real-world exploitation yet - consistent with a freshly disclosed, vendor-reported (Microsoft) flaw that warrants prompt patching but is not yet weaponized. One tension to verify: CWE-59 ('link following') typically involves local filesystem symlink/junction manipulation, yet the vector marks AV:N/PR:N ('unauthorized attacker... over a network'); the available sources do not describe the trigger, so how a network-positioned, unauthenticated attacker reaches the link-resolution path in this Azure service is unexplained and should be confirmed with Microsoft.

Exploit ScenarioDerived

An unauthorized attacker interacts with the network-exposed VM Inspector component for Azure Virtual Machines and causes it to resolve an attacker-influenced link (symlink/junction) during a file-access operation, redirecting that access to a privileged target and elevating privileges across a security boundary (scope change). No public exploit code is identified at time of analysis (CVSS temporal E:U, Unproven), and the exact trigger is not described in the available sources.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.9% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Oct 22, 2026

Privilege escalation in Microsoft VM Inspector for Azure Virtual Machines allows unauthenticated, network-reachable attackers with no user interaction to gain elevated privileges, and the vendor scores it CVSS 10.0 with a scope change (S:C) indicating impact extends beyond the initially vulnerable component. The root cause is a link-following defect (CWE-59): the component resolves a link before accessing a file, so an attacker who can influence a symbolic link or junction can redirect privileged file operations. Microsoft has published a fix through its MSRC update guide and the vuln.today priority is act_now; no public exploit code or CISA KEV entry was identified at time of analysis.

RemediationAI

Apply the update published in Microsoft's MSRC update guide for CVE-2026-110063 (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-110063); the supplied data states a patch is available from the vendor but does not list an exact fixed version number, so confirm the applicable build for your deployment on that advisory before closing the item. Because the defect is a link-following issue resolved before file access, upgrading the VM Inspector component is the only remediation the available sources describe, and no alternative workaround is documented. Given the CVSS 10.0 severity, PR:N/UI:N network reachability and the act_now priority, treat unpatched instances as high exposure, and validate with Microsoft whether the network-reachable, unauthenticated attack path applies to your configuration, since CWE-59 preconditions normally require an attacker-influenced link on a filesystem the service accesses.

Affected VersionsENISA

VM Inspector for Azure Virtual Machines - (version not specified)

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-59 (Improper Link Resolution Before File Access, 'link following') is the class where software resolves a pathname containing a symbolic link or NTFS junction before performing a privileged file read, write or execution, so whoever controls the link controls the resource the process actually touches. The affected component here is Microsoft's VM Inspector for Azure Virtual Machines, identified by the wildcard CPE cpe:2.3:a:microsoft:vm_inspector_for_azure_virtual_machines:*:*:*:*:*:*:*:*, meaning the supplied data does not enumerate specific affected or fixed builds. The assessed vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H describes a low-complexity, network-reachable attack requiring no credentials and no user interaction, with high confidentiality, integrity and availability impact and a scope change. That vector is notable against the CWE class: link-following conditions normally depend on the attacker being able to place or control a link on a filesystem the service accesses, which a pure AV:N/PR:N path does not by itself explain - the specific feature, protocol or configuration that exposes the link-resolution path is not described in the available sources and should be verified with Microsoft rather than assumed.

Know when Vm Inspector For Azure Virtual Machines gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources

No credit card · 7-day full trial

Severity by source

Vendor (microsoft) PRIMARY 10.0 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
vuln.today AI 10.0 CRITICAL

Description states an unauthorized attacker elevates privileges over a network (AV:N/PR:N/UI:N), and the cross-boundary privilege gain in a cloud service supports S:C with full C/I/A impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Improper link resolution before file access ('link following') in VM Inspector for Azure Virtual Machines allows an unauthorized attacker to elevate privileges over a network.

Executive ViewAI

Why It Matters

Microsoft VM Inspector for Azure Virtual Machines contains a critical privilege escalation vulnerability (CVE-2026-110063) that allows unauthenticated, network-reachable attackers to gain elevated privileges with no user interaction. Successful exploitation could lead to full compromise of the VM Inspector service and potentially allow attackers to move laterally within Azure environments, impacting confidentiality, integrity, and availability of cloud workloads and sensitive data.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.9%
Top 41% exploitable
Prevalence
Medium
specific Azure VM inspection component within a widely-used cloud platform
Vendor Status
Publicly Disclosed:No
Exploited:No
Latest Software Release:N/A
Social Media
1
Sightings
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.9%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
High
Technical Impact
Total

Priority Score

51
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +50
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy