Vulnerability-Lookup

CVE-2026-94520 (GCVE-0-2026-94520)

Vulnerability from cvelistv5 – Published: 2026-10-13 20:37 – Updated: 2026-10-13 21:35

Title

Microsoft SQL Server Denial of Service Vulnerability

Summary

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

Severity

4.9 (Medium)


                        
                          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 - Use of Externally-Controlled Format String

Assigner

microsoft CNA under the mitre root

CNA scorecard B 82/100 over 3923 records in the last 180 days details

References

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

8 products

Vendor	Product	Version	CPE status
Microsoft	Microsoft SQL Server 2017 (GDR)	Affected: 14.0.0 , < 14.0.2140.2 (custom)	guessed
Microsoft	Microsoft SQL Server 2017 for x64-based Systems (CU31)	Affected: 14.0.3006.16 , < 14.0.3560.2 (custom)	guessed
Microsoft	Microsoft SQL Server 2019 (GDR)	Affected: 15.0.0 , < 15.0.2200.2 (custom)	guessed
Microsoft	Microsoft SQL Server 2019 for x64-based Systems (CU32)	Affected: 15.0.4003.23 , < 15.0.4500.2 (custom)	guessed
Microsoft	Microsoft SQL Server 2022 (GDR)	Affected: 16.0.0 , < 16.0.1210.3 (custom)	guessed
Microsoft	Microsoft SQL Server 2022 for x64-based Systems (CU27)	Affected: 16.0.4003.1 , < 16.0.4305.5 (custom)	guessed
Microsoft	Microsoft SQL Server 2025 for x64-based Systems (CU9)	Affected: 17.0.4006.2 , < 17.0.5015.4 (custom)	guessed
Microsoft	Microsoft SQL Server 2025 for x64-based Systems (GDR)	Affected: 17.0.1050.2 , < 17.0.1145.4 (custom)	guessed

Date Public

2026-10-13 14:00

Show details on NVD website

JSON

To clipboard

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}

GHSA-VXWQ-JQHM-W2R6

Vulnerability from github – Published: 2026-10-13 21:37 – Updated: 2026-10-13 21:37

Details

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

Severity

4.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-94520"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-134"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-13T21:19:58Z",
    "severity": "MODERATE"
  },
  "details": "Use of externally-controlled format string in SQL Server allows an authorized attacker to deny service over a network.",
  "id": "GHSA-vxwq-jqhm-w2r6",
  "modified": "2026-10-13T21:37:34Z",
  "published": "2026-10-13T21:37:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94520"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-94520"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

NCSC-2026-0420

Vulnerability from csaf_ncscnl - Published: 2026-10-13 18:30 - Updated: 2026-10-13 18:30

Summary

Kwetsbaarheden verholpen in Microsoft SQL Server

Scope

22 vulnerabilities in this advisory, including CVE-2026-94520.

CVE-2026-94520

Known affected: 7 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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