CVE-2026-20180 | Cisco Identity Services Engine Software up to 3.5.0 path traversal (cisco-sa-ise-rce-4fverepv)

VDB-357742 · CVE-2026-20180 · GCVE-0-2026-20180 CISCO IDENTITY SERVICES ENGINE SOFTWARE UP TO 3.5.0 PATH TRAVERSAL HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 9.1 $0-$5k 1.96+ Summaryinfo A vulnerability classified as critical was found in Cisco Identity Services Engine Software. Affected by this vulnerability is an unknown functionality. Executing a manipulation can lead to path traversal. This vulnerability is tracked as CVE-2026-20180. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised. Detailsinfo A vulnerability classified as critical was found in Cisco Identity Services Engine Software. This vulnerability affects an unknown function. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: A vulnerability in Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have at least Read Only Admin credentials. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node ISE deployments, successful exploitation of these vulnerabilities could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored. The advisory is available at sec.cloudapps.cisco.com. This vulnerability was named CVE-2026-20180 since 10/08/2025. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/15/2026). This vulnerability is assigned to T1006 by the MITRE ATT&CK project. Upgrading eliminates this vulnerability. Productinfo Type Policy Management Software Vendor Cisco Name Identity Services Engine Software Version 3.1.0 3.1.0 p1 3.1.0 p2 3.1.0 p3 3.1.0 p4 3.1.0 p5 3.1.0 p6 3.1.0 p7 3.1.0 p8 3.1.0 p9 3.1.0 p10 3.2.0 3.2.0 p1 3.2.0 p2 3.2.0 p3 3.2.0 p4 3.2.0 p5 3.2.0 p6 3.2.0 p7 3.3.0 3.4.0 3.5.0 License commercial Website Vendor: https://www.cisco.com/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 9.4 VulDB Meta Temp Score: 9.1 VulDB Base Score: 8.8 VulDB Temp Score: 8.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 9.9 CNA Vector (cisco): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Path traversal CWE: CWE-22 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 10/08/2025 CVE reserved 04/15/2026 +189 days Advisory disclosed 04/15/2026 +0 days VulDB entry created 04/15/2026 +0 days VulDB entry last update Sourcesinfo Vendor: cisco.com Advisory: cisco-sa-ise-rce-4fverepv Status: Confirmed CVE: CVE-2026-20180 (🔒) GCVE (CVE): GCVE-0-2026-20180 GCVE (VulDB): GCVE-100-357742 Entryinfo Created: 04/15/2026 18:27 Changes: 04/15/2026 18:27 (64) Complete: 🔍 Cache ID: 99:7E6:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸