BUG-000187331 Portal for ArcGIS has a security vulnerability

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

A flaw in Portal for ArcGIS allows unauthenticated access to certain Portal Administrator API endpoints under specific conditions. This could enable an attacker to access administrative functionality that should require authentication.

Source published

13 Oct 2026 16:03:43 UTC

Source modified

14 Oct 2026 18:34:28 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

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CVSS 3.1 · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H