How severe is CVE-2026-33518?

CVE-2026-33518 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-33518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33518?

CVE-2026-33518 affects Esri Portal For Arcgis. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33518?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-33518 have an EU (EUVD) identifier?

Yes. CVE-2026-33518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24337.

When was CVE-2026-33518 published?

CVE-2026-33518 was published on 2026-04-21 and last updated on 2026-06-17.

CVE-2026-33518

CVE-2026-33518 is a critical-severity vulnerability in Esri Portal For Arcgis with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-266.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24337
Weakness: CWE-266
Affected product: Esri Portal For Arcgis
Published: 2026-04-21
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-33518?: 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.
How severe is CVE-2026-33518?: CVE-2026-33518 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-33518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33518?: CVE-2026-33518 affects Esri Portal For Arcgis. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33518?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-33518 have an EU (EUVD) identifier?: Yes. CVE-2026-33518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24337.
When was CVE-2026-33518 published?: CVE-2026-33518 was published on 2026-04-21 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:esri:portal_for_arcgis:11.5:-:*:*:*:*:*:*

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