Cisco Addresses Medium-Severity ISE Vulnerability With Security Patches
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Quick Summary
Cisco has released updates to fix a medium-severity vulnerability in its Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC), tracked as CVE-2026-20029. This flaw, with a CVSS score of 4.9, allows authenticated remote attackers with administrative privileges to access sensitive information through improper XML parsing. The vulnerability affects various versions of Cisco ISE, and while there are no known exploits in the wild, users are urged to update to the latest versions for security.
The Securityish Brief
Cisco has issued security updates for a medium-severity vulnerability in its Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC), identified as CVE-2026-20029. This vulnerability, which has a CVSS score of 4.9, is linked to improper XML parsing in the web-based management interface. An authenticated remote attacker with administrative privileges could exploit this flaw by uploading a malicious file, potentially allowing access to sensitive information that should be restricted even from administrators.
The vulnerability affects several versions of Cisco ISE and ISE-PIC. Specifically, it impacts:
- Cisco ISE or ISE-PIC Release earlier than 3.2 – Migrate to a fixed release
- Cisco ISE or ISE-PIC Release 3.2 – 3.2 Patch 8
- Cisco ISE or ISE-PIC Release 3.3 – 3.3 Patch 8
- Cisco ISE or ISE-PIC Release 3.4 – 3.4 Patch 4
- Cisco ISE or ISE-PIC Release 3.5 – Not vulnerable
Additionally, Cisco has addressed two other medium-severity vulnerabilities related to the processing of Distributed Computing Environment Remote Procedure Call (DCE/RPC) requests. These vulnerabilities, CVE-2026-20026 and CVE-2026-20027, could allow unauthenticated remote attackers to cause denial-of-service conditions or leak sensitive information from the Snort 3 Detection Engine.
As Cisco products are often targeted by cybercriminals, users must prioritize updating to the latest versions to mitigate risks associated with these vulnerabilities.
Key Takeaways
- Update your Cisco ISE or ISE-PIC to the latest patched version to protect against the identified vulnerabilities.
- Review your administrative access protocols to ensure that only necessary personnel have elevated privileges.
- Monitor for any unusual activity in your network that may indicate exploitation attempts.
- Stay informed about security advisories from Cisco and other vendors to maintain your systems’ security posture.
- Consider implementing additional security measures, such as file upload restrictions, to further protect sensitive information.
Key Terms & Concepts
- CVE-2026-20029: In this article, CVE-2026-20029 refers to a medium-severity vulnerability in Cisco’s Identity Services Engine that allows unauthorized access to sensitive information.
- XML Parsing: XML parsing is the process of reading and interpreting XML data, which can be exploited if not handled correctly.
- DCE/RPC: DCE/RPC stands for Distributed Computing Environment/Remote Procedure Call, a protocol that allows programs to communicate over a network.
Read the original article here: https://thehackernews.com/2026/01/cisco-patches-ise-security.html
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