EUVD-2026-41896
GHSA-xj4c-7w4q-9gwv
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated remote upload to a network endpoint (AV:N/AC:L/PR:N/UI:N); CWE-434 file upload plausibly yields server compromise, so C/I/A:H, though execution is inferred not confirmed.
Primary rating from Vendor (Esri).
CVSS VectorVendor: Esri
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
6DescriptionCVE.org
ArcGIS Server contains an unrestricted file upload vulnerability. An unauthenticated attacker could exploit this issue by uploading a crafted file to the affected endpoint. Successful exploitation could allow arbitrary file upload.
AnalysisAI
Unrestricted file upload in Esri ArcGIS Server (all versions through 12.0) lets a remote, unauthenticated attacker push arbitrary files to an exposed administrative/upload endpoint, per CVSS PR:N. Esri self-reported the flaw (CWE-434) and rates it critical (CVSS 9.8), and successful upload of an executable payload can lead to full server compromise. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the specific ArcGIS Server upload/administrative endpoint that handles file uploads; per CVSS PR:N/UI:N, no authentication and no user interaction are needed against a reachable instance. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are mixed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker scans for internet-exposed ArcGIS Server instances and sends a crafted HTTP request to the vulnerable upload endpoint with no credentials, placing a malicious file (e.g., a server-executable web shell) onto the host. Because the vector is AV:N/AC:L/PR:N/UI:N, this requires only network reachability and a single request; if the uploaded file lands in an executable context, the attacker gains code execution and pivots to full server control. … |
| Remediation | Apply the fix per vendor advisory: consult Esri's May 2026 ArcGIS security bulletin (https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/may-2026-arcgis-security-bulletin) and upgrade to the patched ArcGIS Server release Esri specifies-an exact fixed version number is not provided in the available data, so verify it directly against that bulletin (patch available per vendor advisory). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Esri ArcGIS Server instances across versions through 12.0; immediately restrict network access to administrative/upload endpoints via firewall rules; enable detailed audit logging of all upload activities. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Arcgis Server
View allSQL injection vulnerability in ESRI ArcGIS 10.1 allows remote authenticated users to execute arbitrary SQL commands via
A SQL injection vulnerability in feature services provided by Esri ArcGIS Server 10.9 and below allows a remote, unauthe
Esri ArcGIS Server before 10.8 is vulnerable to SSRF in some configurations. Rated critical severity (CVSS 9.8), this vu
A Server-Side Request Forgery (SSRF) vulnerability in ArcGIS Server Manager version 10.8.1 and below may allow a remote,
A SQL injection vulnerability in ArcGIS Server allows an EDIT operation to modify column properties in a manner that cou
There is an improper access control issue in ArcGIS Server versions 11.3 and below on Windows and Linux which, under uni
Esri ArcGIS Server versions 10.9.1 and prior have a path traversal vulnerability that may result in a denial of service
Unauthenticated file disclosure in Esri ArcGIS Server (all versions 12.0 and prior) lets remote attackers read sensitive
SQL injection vulnerability in ESRI ArcGIS for Server through 10.2 allows remote attackers to execute arbitrary SQL comm
There is a local file inclusion vulnerability in ArcGIS Server 11.3 and below that may allow a remote, unauthenticated a
There is a path traversal vulnerability in Esri ArcGIS Server versions 10.9.1 and below. Rated high severity (CVSS 7.5),
Multiple uninitialized pointer vulnerabilities when parsing a specially crafted file in Esri ArcGIS Server 10.8.1 (and e
Same technique File Upload
View allShare
External POC / Exploit Code
Leaving vuln.today