What is CVE-2026-33522?

CVE-2026-33522 is a medium-severity vulnerability in Esri Arcgis Server, classified under Improper Authorization. CVSS score: 5.3/10. Published 2026-10-26.

How severe is CVE-2026-33522?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Esri Arcgis Server

CVE-2026-33522

Esri ArcGIS Server versions 11.3 to 12.0 ONLY allows a remote, unauthenticated attacker to update service metadata. A patch is provided for ArcGIS Server software in General Availability and Extended support status, which includes versions 12.0, 11.5, and 11.3. 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 2026-10-26 · last modified 2026-10-26.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Esri Arcgis Server

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

www.esri.com/arcgis-blog/products/trust-arcgis/administration/october-2026-arcg…

Frequently asked questions

What is CVE-2026-33522?: CVE-2026-33522 is a medium-severity vulnerability in Esri Arcgis Server, classified under Improper Authorization. CVSS score: 5.3/10. Published 2026-10-26.
How severe is CVE-2026-33522?: Medium severity. CVSS v3 base score is 5.3 out of 10.