VulnerabilityModified

CVE-2026-9182

Esri ArcGIS Server contains an unrestricted file upload vulnerability.

CRITICAL 9.8EPSS 0.62%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Esri ArcGIS Server contains an unrestricted file upload vulnerability. An unauthenticated attacker could exploit this issue by uploading a crafted file to the affected endpoint. Successful exploitation could allow arbitrary file upload, potentially allowing for other attacks. This issue impacts all versions of ArcGIS Server on Windows and Linux 12.0 and prior. This issue does not impact ArcGIS Enterprise for Kubernetes.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.62% probability · 48th percentile
CISA KEV: Not listed
Weakness: CWE-434
Affected: esri/arcgis server
Source: psirt@esri.com

References

https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/may-2026-arcgis-security-bulletinVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.