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CVE-2026-33521

7.5 high SSVC exploitation: none Published
NVD · CVE.org

There is s denial of service vulnerability in Esri ArcGIS Server versions 12.0 and prior that may allow a remote, unauthenticated attacker to supply crafted requests that may, under exceptional circumstances, consume all available worker threads and deny service to users. A patch is provided for ArcGIS Server software in General Availability and Extended support status, which includes versions 12.0, 11.5, 11.3, and 11.1. Other versions are in mature or retired status, which are not patch eligible. Users working with unlisted versions are advised to upgrade and apply the patch.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 6

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-26 19:38
  2. StatusPublished → Awaiting AnalysisNVD modified 2026-10-26 20:17
  3. StatusAwaiting Analysis → PublishedNVD modified 2026-10-26 18:07
  4. StatusPublished → Awaiting AnalysisNVD modified 2026-10-26 18:31
  5. StatusAwaiting Analysis → PublishedNVD modified 2026-10-26 18:07
  6. First seenCVSS 7.5NVD modified 2026-10-26 18:31

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 1