# CVE-2026-69857 — Microsoft Azure Cosmos DB

> As of 2026-10-08, CVE-2026-69857 is a HIGH-severity vulnerability in Microsoft Azure Cosmos DB, CVSS v3.1 8.5, EPSS 0.6% (48.7th percentile). Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-69857, most recently “September 2026 Microsoft Patch Tuesday — Record 966+ Vulnerabilities with Two Actively Exploited Zero-Days (CVE-2026-81963, CVE-2026-85880) and Multiple Critical Wormable RCEs”.

**Last updated:** 2026-10-08

## What is CVE-2026-69857?

Authorization bypass through user-controlled key in Azure Cosmos DB allows an authorized attacker to perform spoofing over a network.

The record classifies CVE-2026-69857 under weakness class [CWE-639](https://intel.threadlinqs.com/cwe/CWE-639). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 49 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.5 — HIGH (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **EPSS (FIRST):** 0.6% probability of exploitation in the next 30 days, higher than 48.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-03, last modified 2026-10-08

## Is CVE-2026-69857 being exploited?

It currently carries a trending score of 43 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Microsoft](https://intel.threadlinqs.com/vendors/microsoft): Azure Cosmos DB

## How to fix CVE-2026-69857

Vendor advisory: [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69857](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69857). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2026-69857

2 tracked threats in the Threadlinqs corpus reference CVE-2026-69857, either in the campaign’s CVE list or as an indicator on the campaign record.

- [September 2026 Microsoft Patch Tuesday — Record 966+ Vulnerabilities with Two Actively Exploited Zero-Days (CVE-2026-81963, CVE-2026-85880) and Multiple Critical Wormable RCEs](https://intel.threadlinqs.com/threat/TL-2026-2398) — CRITICAL · 2026-09-08
- [Microsoft September 2026 Patch Tuesday — 999 CVEs, 3 actively exploited zero-days (CVE-2026-85880, CVE-2026-81963, CVE-2026-85046)](https://intel.threadlinqs.com/threat/TL-2026-2407) — CRITICAL · 2026-09-08

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [msrc.microsoft.com — vendor advisory](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69857)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-69857
Full detection coverage and IOCs for threats exploiting CVE-2026-69857 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp