Back to the CVE list
CVE-2026-94520

Microsoft SQL Server Denial of Service Vulnerability

CVSS score

4.9

EPSS probability

%0.6

Risk score

0.0

Published

19 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

Checking session…

Vulnerability description

CVE AI research

The stored explanation is shown at once; refreshing evaluates the sources again.

DayBreach AI Explanation

Verified against sources

Microsoft SQL Server Denial of Service Vulnerability

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

Use of externally-controlled format string in Microsoft SQL Server allows an authorized attacker to deny service over a network.

Why does it matter?

Enabling an authorized attacker to cause a denial of service over the network can lead to critical operational disruptions.

What should be done?

  • Review the Microsoft security advisory
  • Apply the provided patch references
Chain of evidence and sources2 verified claims

Microsoft SQL Server içindeki harici denetimli biçim dizesi kullanımı, yetkili bir saldırganın ağ üzerinden hizmet kesintisi yaratmasına izin verir.

S0 · daybreach-canonicalS1 · cvelist

Zafiyet için mevcut yama ve düzeltilmiş sürüm kanıtları bulunmaktadır.

S0 · daybreach-canonical
Show the technical text from the sources

Use of externally-controlled format string in SQL Server allows an authorized attacker to deny service over a network.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

CWE: CWE-134

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-94520 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1microsoftMicrosoft SQL Server 2017 (GDR) View
2microsoftMicrosoft SQL Server 2017 for x64-based Systems (CU31) View
3microsoftMicrosoft SQL Server 2019 (GDR) View
4microsoftMicrosoft SQL Server 2019 for x64-based Systems (CU32) View
5microsoftMicrosoft SQL Server 2022 (GDR) View
6microsoftMicrosoft SQL Server 2022 for x64-based Systems (CU27) View
7microsoftMicrosoft SQL Server 2025 for x64-based Systems (CU9) View
8microsoftMicrosoft SQL Server 2025 for x64-based Systems (GDR) View
Total affected vendors: 1|Products: 8

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
4.9CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:CCVE CNA
4.9CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

cvelist

Microsoft SQL Server Denial of Service Vulnerability

Open source
reference

Microsoft SQL Server Denial of Service Vulnerability

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-94520 is associated with the following CWEs:

CWE-134: Common Weakness Enumeration Entry CWE-134

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-94520 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsHigh
UserGerekmiyor

Official Sources and Advisories

Microsoft SQL Server Denial of Service Vulnerabilitypatch

CVSS Vector Radar Chart

4.9 / 10
Attack VectorNetworkComplexityLowPrivilegesHighUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama doğrulandı

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

M
microsoft logo
microsoft

Weakness Type (CWE & CAPEC)

CWE-134

Similar Vulnerabilities

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free keyDocumentation
curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-94520"