Vulnerability · CVE-2026-83938
Azure Kubernetes Configuration Service Elevation of Privilege Vulnerability
Published Oct 22, 2026 · catalog updated Oct 26, 2026 · Microsoft Azure
Last checked Nov 6, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-83938. EPSS is 0.71%. Act only if a listed version of Microsoft Azure is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-108456 · High
- CVE-2026-110063 · Critical
- CVE-2026-105014 · Critical
- Severity
- Critical10.0
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.71%
- Remediation
- Advisory link
- Affected products
- microsoft Azure Kubernetes Configuration Service · vendor Microsoft
Missing authentication for critical function in Azure Kubernetes Configuration Service allows an unauthorized attacker to elevate privileges over a network.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- microsoft Azure Kubernetes Configuration Serviceversion unspecified
- vendor Microsoftversion unspecified
How to fix CVE-2026-83938
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-83938. EPSS is 0.71%. Act only if a listed version of Microsoft Azure is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-306: Missing Authentication for Critical Function. EPSS 0.71%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 22, 2026 · Microsoft Security Update Guide
Detected
Affected Microsoft products: Azure Kubernetes Configuration Service.
Oct 26, 2026 · EUVD
Updated
Missing authentication for critical function in Azure Kubernetes Configuration Service allows an unauthorized attacker to elevate privileges over a network.
Sources
- CSAF AdvisoriesVendor advisorymsrc_CVE-2026-83938:CVE-2026-83938
Microsoft
msrc.microsoft.com - CVE.orgVulnerability recordCVE-2026-83938
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-83938
30-day exploitation probability 0.71%
first.org - EUVDVulnerability recordEUVD-2026-108541
Missing authentication for critical function in Azure Kubernetes Configuration Service allows an unauthorized attacker to elevate privileges over a network.
euvd.enisa.europa.eu - Microsoft Security Update GuideVendor advisoryCVE-2026-83938
Azure Kubernetes Configuration Service
msrc.microsoft.com
References
Freshness
Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- Microsoft Security Update GuideNov 6, 2026
- FIRST EPSSOct 28, 2026
- EUVDOct 26, 2026
- CSAF AdvisoriesOct 25, 2026
- CVE.orgOct 23, 2026