---
id: CVE-2026-2812
title: >-
  ArcGIS Server contains an improper authentication vulnerability in an
  undocumented administrative endpoint
summary: >-
  ArcGIS Server contains an improper authentication vulnerability in an
  undocumented administrative endpoint. An unauthenticated attacker could
  exploit this issue by sending a crafted request to the endpoint. Successful
  exploitation may re…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-287
vendor: esri
product: arcgis_server
affected:
  - 'arcgis_server >= 11.1, <= 12.0'
published: '2026-05-20'
updated: '2026-07-23'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-2812'
references:
  - url: >-
      https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/april2026_security_bulletin
    label: psirt@esri.com
tags:
  - nvd
epss: 0.0036
epssPercentile: 0.29803
ingestedAt: '2026-07-23T13:18:08.450Z'
---

## Overview

ArcGIS Server contains an improper authentication vulnerability in an undocumented administrative endpoint. An unauthenticated attacker could exploit this issue by sending a crafted request to the endpoint. Successful exploitation may result in disruption of the web-based browsing interface. This issue affects ArcGIS Server 12.0 and earlier.

## Affected

- `arcgis_server >= 11.1, <= 12.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.