A vulnerability in the REST API of the web-based user interface (web UI) of Cisco IOS XE 3.1 through 16.5 could allow an unauthenticated, remote attacker to bypass authentication to the REST API of the web UI of the affected software. The vulnerability is due to insufficient input validation for the REST API of the affected software. An attacker could exploit this vulnerability by sending a malicious API request to an affected device. A successful exploit could allow the attacker to bypass authentication and gain access to the web UI of the affected software. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS XE Software, if the HTTP Server feature is enabled for the device. The newly redesigned, web-based administration UI was introduced in the Denali 16.2 Release of Cisco IOS XE Software. This vulnerability does not affect the web-based administration UI in earlier releases of Cisco IOS XE Software. Cisco Bug IDs: CSCuz46036.
This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.
First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2017-09-29T01:34:48.670
2025-04-20T01:37:25.860
Deferred
CVSSv3.0: 9.8 (CRITICAL)
AV:N/AC:L/Au:N/C:C/I:C/A:C
10.0
10.0
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | cisco | ios_xe | 3.1.3as | Yes |
| Operating System | cisco | ios_xe | 3.2.0ja | Yes |
| Operating System | cisco | ios_xe | 3.2.1xo | Yes |
| Operating System | cisco | ios_xe | 3.4.7asg | Yes |
| Operating System | cisco | ios_xe | 3.6.5be | Yes |
| Operating System | cisco | ios_xe | 3.8.0ex | Yes |
| Operating System | cisco | ios_xe | 3.18.3vs | Yes |
| Operating System | cisco | ios_xe | 16.1.1 | Yes |
| Operating System | cisco | ios_xe | 16.1.2 | Yes |
| Operating System | cisco | ios_xe | 16.1.3 | Yes |
| Operating System | cisco | ios_xe | 16.1.3a | Yes |
| Operating System | cisco | ios_xe | 16.1.4 | Yes |
| Operating System | cisco | ios_xe | 16.2.1 | Yes |
| Operating System | cisco | ios_xe | 16.2.2a | Yes |
| Operating System | cisco | ios_xe | 16.3.1a | Yes |
| Operating System | cisco | ios_xe | 16.5.1a | Yes |
| Operating System | cisco | ios_xe | 16.5.1c | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.