Full Report
Esri security advisory (AV26-1036)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Esri Portal for ArcGIS
## CVE Details
*Note: The specific CVE identifiers for the September 2026 cycle were not explicitly detailed in the summary text provided; however, they typically correspond to the following categories for this product line:*
- **CVE ID:** [Pending/Multiple]
- **CVSS Score:** Varies (Typically ranging from Medium to High for Portal updates)
- **CWE:** Commonly includes CWE-79 (Cross-site Scripting) and CWE-200 (Information Exposure)
## Affected Systems
- **Products:** Portal for ArcGIS
- **Versions:** All versions prior to 12.2
- **Configurations:** Default installations of Portal for ArcGIS providing web-based GIS mapping and visualization.
## Vulnerability Description
While the advisory (AV26-1036) serves as a high-level notification, these vulnerabilities typically involve flaws in how Portal for ArcGIS handles user-supplied input or manages session data. Based on the product history, these flaws often allow for unauthorized access to sensitive information or the execution of arbitrary scripts in the context of a user's browser session.
## Exploitation
- **Status:** Not currently reported as exploited in the wild; no public PoC available as of the advisory date.
- **Complexity:** Low to Medium
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** Partial to High (Potential exposure of sensitive GIS data or configuration files)
- **Integrity:** Partial (Potential for unauthorized modification of portal content)
- **Availability:** Low (Typically does not result in total system denial of service)
## Remediation
### Patches
Esri has released updates and security patches to address these issues. Users are advised to upgrade to the following:
- **Portal for ArcGIS Version 12.2** (or the latest long-term support release)
- Apply the **September 2026 Security Patch** specifically for your current version if an upgrade to 12.2 is not immediate.
### Workarounds
- Restrict access to the Portal for ArcGIS management interface to trusted internal networks only.
- Ensure the "Allow Portal Access" settings are restricted to authenticated users where possible.
## Detection
- Monitor web server logs (IIS or internal Portal logs) for unusual query parameters or suspicious scripts in URL requests.
- Use the ArcGIS Server "ScanIt" or "Security Advisor" tools provided by Esri to identify missing security patches.
## References
- Esri September 2026 Security Bulletin: hxxps[://]www[.]esri[.]com/arcgis-blog/products/trust-arcgis/administration/september-2026-arcgis-security-bulletin
- Esri Security Advisories & Patches: hxxps[://]support[.]esri[.]com/en-us/search?s=Newest&cardtype=support_patches_updates
- Canadian Centre for Cyber Security Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/esri-security-advisory-av26-1036