CVE-2026-20136 | Cisco Identity Services Engine Software up to 3.5.0 CLI command injection (cisco-sa-ise-cmd-inj-5WSJcYJB / EUVD-2026-22960)

VDB-357751 · CVE-2026-20136 · EUVD-2026-22960 CISCO IDENTITY SERVICES ENGINE SOFTWARE UP TO 3.5.0 CLI COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.2 $0-$5k 4.47+ Summaryinfo A vulnerability identified as critical has been detected in Cisco Identity Services Engine Software. This impacts an unknown function of the component CLI. This manipulation causes command injection. This vulnerability is handled as CVE-2026-20136. It is possible to launch the attack on the local host. There is not any exploit available. You should upgrade the affected component. Detailsinfo A vulnerability classified as critical was found in Cisco Identity Services Engine Software. Affected by this vulnerability is some unknown functionality of the component CLI. The manipulation with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is: A vulnerability in the CLI of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, local attacker with administrative privileges to perform a command injection attack on the underlying operating system and elevate privileges to root. This vulnerability is due to insufficient validation of user supplied input. An attacker could exploit this vulnerability by providing crafted input to a specific CLI command. A successful exploit could allow the attacker to elevate their privileges to root on the underlying operating system. It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2026-20136 since 10/08/2025. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation needs additional levels of successful authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k 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. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-22960). 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: 6.4 VulDB Meta Temp Score: 6.2 VulDB Base Score: 6.7 VulDB Temp Score: 6.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.0 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: Partially Local: Yes Remote: No 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-cmd-inj-5WSJcYJB Status: Confirmed CVE: CVE-2026-20136 (🔒) GCVE (CVE): GCVE-0-2026-20136 GCVE (VulDB): GCVE-100-357751 EUVD: 🔒 Entryinfo Created: 04/15/2026 18:30 Updated: 04/15/2026 20:03 Changes: 04/15/2026 18:30 (65), 04/15/2026 20:03 (1) Complete: 🔍 Cache ID: 99:BBE:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸