CVE-2026-33518

CRITICALNVD 9.89.8—

9.8

An incorrect privilege assignment vulnerability exists in Esri Portal for ArcGIS 11.5 in Windows and Linux that allows highly privileged users to create developer credentials that may grant more privileges than expected.

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 18.2%
KEV: Not listed

Published

April 21, 2026

Last Modified

May 18, 2026

References (1)

psirt@esrihttps://www.esri.com/arcgis-blog/products/trust-arcgis/administration/april2026_security_bulletin

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-266

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2026-33518?

CVE-2026-33518 is a critical vulnerability published on April 21, 2026. An incorrect privilege assignment vulnerability exists in Esri Portal for ArcGIS 11.5 in Windows and Linux that allows highly privileged users to create developer credentials that may grant more privileges than expected.

When was CVE-2026-33518 disclosed?

CVE-2026-33518 was first published in the National Vulnerability Database on April 21, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-33518 actively exploited?

CVE-2026-33518 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 18.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-33518?

CVE-2026-33518 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2026-33518?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33518, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-33518

📅 Published

🔄 Last Modified

🔗 References (1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-33518?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (1)

Frequently asked(5)

Related CVEs(same CWE)