Medium 5.3Published May 20, 2026

CVE-2026-2812Improper Authentication issue in ArcGIS Server

Updated under an hour ago (Oct 26, 2026, 10:00 PM ET)

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It affects Esri ArcGIS Server. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Esri ArcGIS Server

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Esri
NVD analysis: Analyzed
Record last updated: May 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Esri ArcGIS Server esri:arcgis_server (from the name)	from 11.1 through 12.0	CNA record
esri arcgis_server esri:arcgis_server	from 11.1 through 12.0	NVD

References

References

https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/april2026_security_bulletin	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.