Skip to main content

Azure Synapse EUVDEUVD-2026-41444

| CVE-2026-26145 CRITICAL
Improper Access Control (CWE-284)
2026-07-02 microsoft GHSA-g6fh-wh88-hxp9
Critical
Disputed · 9.8 NVD
Temporal: 4.3
View

Attack ChainAIDerived

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

  1. Access
    Authenticate with low-privilege Synapse identity
  2. Delivery
    Send crafted request over network
  3. Exploit
    Bypass improper access control check
  4. Execution
    Elevate to higher-privileged role
  5. Impact
    Gain total control of data resources

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

The description specifies an 'authorized attacker' elevating privileges over a network, so the concrete prerequisite is possession of an existing authorized/authenticated identity with network reachability to the Azure Synapse service - this directly contradicts the CVSS PR:N and indicates at least low-privilege authentication is required in practice. What limits exploitation: the attacker must already have some legitimate access to (or a foothold reachable to) the targeted Synapse workspace, no public exploit exists, CISA SSVC records the exploit as not automatable and no observed exploitation, and EPSS is low (0.33%). No specific non-default configuration is named in the source data as a requirement.

Impact

The signals are notably in tension and should be weighed carefully. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N, all-High impact) yields a critical 9.8 implying trivial unauthenticated network exploitation, yet the description explicitly states an 'authorized attacker' elevates privileges - a contradiction, since PR:N denotes no privileges required. This discrepancy suggests the true prerequisite is a low-privileged but authenticated Synapse identity, making the effective vector closer to PR:L; verify with the vendor advisory. Countervailing signals lower real-world urgency: EPSS is only 0.33% (24th percentile), CISA SSVC reports Exploitation: none and Automatable: no, and no POC is known - so this is a high-CVSS issue without evidence of imminent mass exploitation. However, SSVC Technical Impact is 'total,' matching the all-High CVSS impact, so a successful exploit is genuinely severe. Net: patch promptly given the cloud attack surface and total impact, but this is not currently an actively-exploited emergency.

Exploit ScenarioDerived

An attacker holding a low-privilege authorized identity within (or reachable to) an Azure Synapse workspace sends crafted requests over the network that exploit the missing authorization check, causing the service to grant actions beyond the attacker's assigned role. Leveraging the low attack complexity, the attacker escalates to a higher-privileged context and gains total control over the affected data and processing resources. No public proof-of-concept is known, so exploitation would require original research against the service.

Monitor Track and reassess. Why: Vendor states no customer action required.
Patch available 0.3% exploitation probability (EPSS)

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

Alert me

AnalysisAIv3 – Jul 07, 2026

Privilege elevation in Microsoft Azure Synapse Analytics allows a network-based, authorized attacker to bypass improper access controls and gain higher privileges than assigned. The flaw carries a critical 9.8 CVSS with full confidentiality, integrity, and availability impact, though its EPSS probability is modest (0.33%, 24th percentile) and CISA SSVC records no observed exploitation. No public exploit has been identified at time of analysis, and Microsoft has released a fix through its Security Update Guide.

Earlier versions of this analysis (2)
v2 Jul 07, 2026 - 14:43 cvss changed CVSS 9.8

Privilege escalation in Microsoft Azure Synapse Analytics lets a network-based attacker gain elevated privileges due to improper access control (CWE-284), yielding total impact to confidentiality, integrity, and availability. Microsoft's own advisory (MSRC) confirms the flaw and a patch, and while the CVSS base score is critical (9.8), there is no public exploit identified at time of analysis and EPSS exploitation probability is low (0.33%, 24th percentile). Note a signal conflict: the description characterizes the actor as an 'authorized attacker' while the CVSS vector encodes PR:N (unauthenticated) - this should be verified against MSRC.

v1 Jul 02, 2026 - 22:52 CVSS 4.8

Privilege escalation in Microsoft Azure Synapse Analytics allows an authorized but lower-privileged attacker to bypass access controls over a network connection, resulting in high confidentiality impact through unauthorized data exposure. The flaw stems from improper access control enforcement (CWE-284) within the Synapse platform, exploitable under high-complexity conditions with required user interaction. No active exploitation has been confirmed via CISA KEV; however, the CVSS temporal metric (E:P) indicates proof-of-concept code exists, and Microsoft has released an official patch via MSRC.

RemediationAI

Because Azure Synapse is a Microsoft-managed cloud service, remediation is primarily service-side: Microsoft reports a patch is available per the Security Update Guide (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26145), and customers should confirm their workspaces are running the updated service and apply any customer-actionable steps Microsoft specifies there. No exact fix version applies given the SaaS delivery model. As compensating controls while validating the fix, restrict Synapse workspace access using Azure RBAC least-privilege role assignments, enforce network isolation via Managed Virtual Network and private endpoints to limit the network attack surface implied by AV:N, disable public network access to the workspace where feasible, and audit workspace/role assignments and Synapse activity logs for anomalous privilege changes. Tightening network access may break connectivity for integration runtimes or external clients, so validate data-pipeline dependencies before enforcing isolation.

Affected VersionsENISA

Azure Synapse - (version not specified)

Affected Packages

microsoft azure_synapse fix: Azure Synapse

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in microsoft

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

Technical ContextAI · show details

Azure Synapse Analytics is Microsoft's cloud-based enterprise analytics service that unifies data warehousing, big-data (Spark) processing, and data-integration pipelines within the Azure platform. The root cause is classified as CWE-284 (Improper Access Control), meaning the service fails to properly enforce authorization boundaries so that an already-authenticated identity can perform actions or reach resources beyond its intended permission set. Because Synapse is a multi-tenant managed cloud service, an access-control weakness in its authorization layer can affect the isolation between workspace roles, users, or tenants. The single CPE provided (cpe:2.3:a:microsoft:azure_synapse:*) is version-agnostic, consistent with a continuously-updated cloud service rather than a discretely versioned on-premises product.

Know when Azure Synapse 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

Sources disagree (Medium–Critical)
Vendor (microsoft) PRIMARY MEDIUM
NVD 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
ENISA EUVD HIGH
CIRCL (temporal) 4.3 MEDIUM
vuln.today AI 8.8 HIGH

Description states an 'authorized attacker,' so PR:L rather than PR:N; network vector and low complexity retained, with total technical impact giving C/I/A:H.

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

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

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

Lifecycle Timeline

4
Analysis Updated
Jul 07, 2026 - 14:43 vuln.today
v3 - CVSS changed
Analysis Updated
Jul 07, 2026 - 14:43 vuln.today
v2 - CVSS changed
Severity Changed
Jul 07, 2026 - 14:37 NVD
MEDIUM CRITICAL
CVSS changed
Jul 07, 2026 - 14:37 NVD
4.8 (MEDIUM) 9.8 (CRITICAL)

DescriptionNVD

Improper access control in Azure Synapse allows an authorized attacker to elevate privileges over a network.

Executive ViewAI

Why It Matters

Microsoft Azure Synapse Analytics contains a critical privilege escalation flaw (CVE-2026-26145, CVSS 9.8) that enables authenticated users to escalate their access beyond their assigned permissions. Organizations using Synapse to manage sensitive analytics or business intelligence data face elevated risk of unauthorized data access or modification. While no active exploitation has been confirmed to date, this control deficiency warrants prompt patching given the platform's typical role in enterprise data governance.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.3%
Top 76% exploitable
Prevalence
Medium
widely-used Azure analytics service, but narrower than ubiquitous core infrastructure
Threat Intel
2
1 sources
Vendor Action
No Action
Not required. The vulnerability documented by this CVE requires no customer action to resolve.
Vendor Status
Publicly Disclosed:No
Exploited:No
Latest Software Release:N/A
Data Quality
7 sources
Confidence: High

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 0.3%
Patch available Yes
Active threat No
Deciding rule
Vendor states no customer action required
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
No
Human Impact
High
Technical Impact
Total

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: +5

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