{"id":"CVE-2026-33522","kind":"vulnerability","aliases":["CVE-2026-33522"],"related":[],"title":"Esri ArcGIS Server: unauthenticated remote users can change service metadata","description":"Esri ArcGIS Server versions 11.3 to 12.0 ONLY allows a remote, unauthenticated attacker to update service metadata. A patch is provided for ArcGIS Server software in General Availability and Extended support status, which includes versions 12.0, 11.5, and 11.3. 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.","summary":"Esri ArcGIS Server versions 11.3 through 12.0 let a remote attacker with no account update service metadata. The sources do not say what an attacker can change beyond that metadata.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["arcgis-server","gis","other","self-hosted"],"not_affected_if":["unknown"],"how_to_check":"- Confirm the ArcGIS Server version in the Server Manager or installation directory; affected range is `11.3` to `12.0`\n- unknown for any other check, the sources do not say","fix":"- Apply the Esri patch for ArcGIS Server `12.0`, `11.5` or `11.3`, or upgrade to a patch-eligible release\n- Versions outside those listed are mature or retired and not patch eligible, so upgrade them","status":"open","published_at":"2026-10-26T18:17:46+00:00","first_seen_at":"2026-10-26T18:31:44+00:00","triaged_at":"2026-10-26T18:34:15+00:00","updated_at":"2026-10-26T18:34:15+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-26T18:34:15Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Esri patch for ArcGIS Server `12.0`, `11.5` or `11.3`, or upgrade to a patch-eligible release\n- Versions outside those listed are mature or retired and not patch eligible, so upgrade them","reach":"internet","title":"Esri ArcGIS Server: unauthenticated remote users can change service metadata","impact":"medium","summary":"Esri ArcGIS Server versions 11.3 through 12.0 let a remote attacker with no account update service metadata. The sources do not say what an attacker can change beyond that metadata.","category":"other","nicknames":[],"who_cares":["arcgis-server","gis","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Remote attacker without credentials changes service metadata on the server","analyst_note":"Confirm from the Esri security bulletin which patched versions exist and whether the flaw is reachable on default configuration; the NVD entry alone gives no fix versions or exposure detail.","how_to_check":"- Confirm the ArcGIS Server version in the Server Manager or installation directory; affected range is `11.3` to `12.0`\n- unknown for any other check, the sources do not say","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"ArcGIS Server installations in the affected version range are exposed to remote unauthenticated requests that update service metadata. The sources do not say which deployment settings or network exposure are required. Teams on other versions should still check whether they are in a supported patch line.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000621,"input_tokens":3375,"output_tokens":567,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-33522':13A,16A '11.3':29B,59C,93C '11.5':91C '12.0':31B,61C,90C 'account':38B 'advis':113C 'allow':63C 'appli':117C 'arcgi':2A,18B,26B,56C,77C 'arcgis-serv':17B 'attack':35B,49B,67C 'avail':82C 'beyond':52B 'chang':8A,51B 'cve':11A,14A 'elig':106C 'esri':1A,25B,55C 'extend':84C 'general':81C 'gis':20B 'host':24B 'includ':88C 'let':32B 'matur':98C 'metadata':10A,41B,54B,71C 'patch':73C,105C,119C 'provid':75C 'remot':5A,34B,65C 'retir':100C 'say':46B 'self':23B 'self-host':22B 'server':3A,19B,27B,57C,78C 'servic':9A,40B,70C 'softwar':79C 'sourc':43B 'status':86C,101C 'support':85C 'unauthent':4A,66C 'unlist':110C 'updat':39B,69C 'upgrad':115C 'user':6A,107C 'version':28B,58C,89C,95C,111C 'work':108C","nicknames":[],"mitigations":[],"who_affected":"ArcGIS Server installations in the affected version range are exposed to remote unauthenticated requests that update service metadata. The sources do not say which deployment settings or network exposure are required. Teams on other versions should still check whether they are in a supported patch line.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T18:17:46+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","cvss_by":"psirt@esri.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-33522","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33522","severity":null,"published_at":"2026-10-26T18:17:46+00:00","modified_at":"2026-10-26T18:31:27+00:00","first_seen_at":"2026-10-26T18:31:44+00:00","fetched_at":"2026-10-26T18:31:44+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}