Affects widely used Esri ArcGIS Portal; privilege escalation enables unauthorized access across many deployments.
CVE-2026-33518
Privilege escalation in Esri Portal for ArcGIS 11.5 allows dev credentials with elevated rights.
Is CVE-2026-33518 being exploited?
Not confirmed. CVE-2026-33518 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-33518?
CVE-2026-33518 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-33518?
Yes. A fix has been recorded for CVE-2026-33518. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33518 affect?
CVE-2026-33518 affects Esri Portal for ArcGIS 11.5 on Windows, Esri Portal for ArcGIS 11.5 on Linux. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33518?
Patch when available; audit/revoke elevated dev credentials; enforce least privilege
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
High-privilege creation of developer credentials may grant broader ArcGIS access and control.
Immediate action required
- affected11.5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.