CVE-2026-20147 | Cisco Identity Services Engine Software command injection (cisco-sa-ise-rce-traversal-8bYndVrZ)

VDB-357741 · CVE-2026-20147 · GCVE-0-2026-20147 CISCO IDENTITY SERVICES ENGINE SOFTWARE COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 9.1 $5k-$25k 5.31+ Summaryinfo A vulnerability classified as critical has been found in Cisco Identity Services Engine Software and ISE Passive Identity Connector. Affected is an unknown function. Performing a manipulation results in command injection. This vulnerability is identified as CVE-2026-20147. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability classified as critical has been found in Cisco Identity Services Engine Software and ISE Passive Identity Connector (version now known). This affects some unknown processing. The manipulation with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: A vulnerability in Cisco ISE and Cisco ISE-PIC 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 valid administrative 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 this vulnerability 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 shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2026-20147 since 10/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/15/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue. Upgrading eliminates this vulnerability. Productinfo Type Policy Management Software Vendor Cisco Name Identity Services Engine Software ISE Passive Identity Connector 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-traversal-8bYndVrZ Status: Confirmed CVE: CVE-2026-20147 (🔒) GCVE (CVE): GCVE-0-2026-20147 GCVE (VulDB): GCVE-100-357741 Entryinfo Created: 04/15/2026 18:26 Changes: 04/15/2026 18:26 (63) Complete: 🔍 Cache ID: 99:C57:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸