CVE-2026-20186 | Cisco Identity Services Engine Software up to 3.4.0 command injection (cisco-sa-ise-rce-4fverepv)

VDB-357743 · CVE-2026-20186 · GCVE-0-2026-20186 CISCO IDENTITY SERVICES ENGINE SOFTWARE UP TO 3.4.0 COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 9.1 $5k-$25k 3.91+ Summaryinfo A vulnerability, which was classified as critical, has been found in Cisco Identity Services Engine Software. Affected by this issue is some unknown functionality. The manipulation leads to command injection. This vulnerability is listed as CVE-2026-20186. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component. Detailsinfo A vulnerability, which was classified as critical, has been found in Cisco Identity Services Engine Software. This issue affects an unknown functionality. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is: 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. It is possible to read the advisory at sec.cloudapps.cisco.com. The identification of this vulnerability is CVE-2026-20186 since 10/08/2025. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/15/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK. 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 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: Command injection CWE: CWE-77 / CWE-74 / CWE-707 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-2026-20186 (🔒) GCVE (CVE): GCVE-0-2026-20186 GCVE (VulDB): GCVE-100-357743 Entryinfo Created: 04/15/2026 18:27 Changes: 04/15/2026 18:27 (64) Complete: 🔍 Cache ID: 99:79B:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸