Vulnerability in Esri Portal for ArcGIS

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.8

[ Description ]Official description

A flaw in Portal for ArcGIS allows unauthenticated access to certain Portal Administrator API endpoints under specific conditions. This could enable an attacker to access administrative functionality that should require authentication.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund27 Sep 2026WID-SEC-2026-3601

  ESRI ArcGIS: Multiple vulnerabilities allow an unspecified attack Translated from German

  CVE-2026-10759CVE-2026-69226CVE-2026-69227

[ References ]References

• www.esri.com/arcgis-blog/products/trust-arcgis/administration/september-2026-arcgis-sec…