CVE Feed

    Dashboard / CVE / CVE-2026-33521

    CVE-2026-33521

    There is s denial of service vulnerability in Esri ArcGIS Server versions 12.0 and prior that may allow a remote, unauthenticated attacker to supply crafted requests that may, under exceptional circumstances, consume all available worker threads and deny service to users. A patch is provided for ArcGIS Server software in General Availability and Extended support status, which includes versions 12.0, 11.5, 11.3, and 11.1. Other versions are in mature or retired status, which are not patch eligible. Users working with unlisted versions are advised to upgrade and apply the patch.

    Published:Oct 26, 2026
    Last Modified:Oct 26, 2026
    EPS:Oct 26, 2026
    EPSS Score:0.00448
    CVSS Score:7.5

    Affected Products

    Vendor
    Esri
    Product
    Arcgis Server

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-50096 (CVSS 6.1) — There is a reflected cross site scripting vulnerability in Esri Portal for ArcGIS versions 12.1 and prior whic…
    CVE-2026-50095 (CVSS 6.1) — There is a stored cross site scripting issue in Esri ArcGIS Server 11.1 and earlier on Windows and Linux that …
    CVE-2026-33522 (CVSS 5.3) — Esri ArcGIS Server versions 11.3 to 12.0 ONLY allows a remote, unauthenticated attacker to update service meta…
    CVE-2026-33520 (CVSS 6.1) — There is a reflected cross site scripting vulnerability in Esri Portal for ArcGIS versions 12.1 and prior whic…
    CVE-2026-10757 (CVSS 9.8) — There is a SQL injection vulnerability in Esri ArcGIS Server versions 12.1 and earlier on Windows and Linux th…
    CVE-2026-9181 (CVSS 9.8) — Esri ArcGIS Server contains a directory traversal vulnerability. ArcGIS Enterprise on Kubernetes is not impact…
    CVE-2026-9182 (CVSS 9.8) — Esri ArcGIS Server contains an unrestricted file upload vulnerability. An unauthenticated attacker could explo…
    CVE-2026-2813 (CVSS 4.7) — ArcGIS Server contains an input validation weakness in the login redirection workflow. An Authenticated attack…
    CVE-2026-2812 (CVSS 5.3) — ArcGIS Server contains an improper authentication vulnerability in an undocumented administrative endpoint. An…
    CVE-2025-67711 (CVSS 6.1) — There is a stored cross site scripting issue in Esri ArcGIS Server 11.4 and earlier on Windows and Linux that …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-33521 — Esri (High 7.5) | CVE-DB