As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20272 are related to issues with improper neutralization of special elements that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-74.
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.
Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2026-08-05T17:16:49.053
2026-08-14T21:17:15.160
Modified
CVSSv3.1: 9.8 (CRITICAL)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | cisco | ios_xe | 16.6.2 | Yes |
| Operating System | cisco | ios_xe | 16.6.3 | Yes |
| Operating System | cisco | ios_xe | 16.6.4 | Yes |
| Operating System | cisco | ios_xe | 16.6.4a | Yes |
| Operating System | cisco | ios_xe | 16.6.4s | Yes |
| Operating System | cisco | ios_xe | 16.6.5 | Yes |
| Operating System | cisco | ios_xe | 16.6.5a | Yes |
| Operating System | cisco | ios_xe | 16.6.5b | Yes |
| Operating System | cisco | ios_xe | 16.6.6 | Yes |
| Operating System | cisco | ios_xe | 16.6.7 | Yes |
| Operating System | cisco | ios_xe | 16.6.7a | Yes |
| Operating System | cisco | ios_xe | 16.6.8 | Yes |
| Operating System | cisco | ios_xe | 16.6.9 | Yes |
| Operating System | cisco | ios_xe | 16.6.10 | Yes |
| Operating System | cisco | ios_xe | 16.7.1 | Yes |
| Operating System | cisco | ios_xe | 16.7.1a | Yes |
| Operating System | cisco | ios_xe | 16.7.1b | Yes |
| Operating System | cisco | ios_xe | 16.7.2 | Yes |
| Operating System | cisco | ios_xe | 16.7.3 | Yes |
| Operating System | cisco | ios_xe | 16.7.4 | Yes |
| Operating System | cisco | ios_xe | 16.8.1 | Yes |
| Operating System | cisco | ios_xe | 16.8.1a | Yes |
| Operating System | cisco | ios_xe | 16.8.1b | Yes |
| Operating System | cisco | ios_xe | 16.8.1c | Yes |
| Operating System | cisco | ios_xe | 16.8.1d | Yes |
| Operating System | cisco | ios_xe | 16.8.1e | Yes |
| Operating System | cisco | ios_xe | 16.8.1s | Yes |
| Operating System | cisco | ios_xe | 16.8.2 | Yes |
| Operating System | cisco | ios_xe | 16.8.3 | Yes |
| Operating System | cisco | ios_xe | 16.9.1 | Yes |
| Operating System | cisco | ios_xe | 16.9.1a | Yes |
| Operating System | cisco | ios_xe | 16.9.1b | Yes |
| Operating System | cisco | ios_xe | 16.9.1c | Yes |
| Operating System | cisco | ios_xe | 16.9.1d | Yes |
| Operating System | cisco | ios_xe | 16.9.1s | Yes |
| Operating System | cisco | ios_xe | 16.9.2 | Yes |
| Operating System | cisco | ios_xe | 16.9.2a | Yes |
| Operating System | cisco | ios_xe | 16.9.2s | Yes |
| Operating System | cisco | ios_xe | 16.9.3 | Yes |
| Operating System | cisco | ios_xe | 16.9.3a | Yes |
| Operating System | cisco | ios_xe | 16.9.3h | Yes |
| Operating System | cisco | ios_xe | 16.9.3s | Yes |
| Operating System | cisco | ios_xe | 16.9.4 | Yes |
| Operating System | cisco | ios_xe | 16.9.4c | Yes |
| Operating System | cisco | ios_xe | 16.9.5 | Yes |
| Operating System | cisco | ios_xe | 16.9.5f | Yes |
| Operating System | cisco | ios_xe | 16.9.6 | Yes |
| Operating System | cisco | ios_xe | 16.9.7 | Yes |
| Operating System | cisco | ios_xe | 16.9.8 | Yes |
| Operating System | cisco | ios_xe | 16.9.8a | Yes |
| Operating System | cisco | ios_xe | 16.9.8b | Yes |
| Operating System | cisco | ios_xe | 16.10.1 | Yes |
| Operating System | cisco | ios_xe | 16.10.1a | Yes |
| Operating System | cisco | ios_xe | 16.10.1b | Yes |
| Operating System | cisco | ios_xe | 16.10.1c | Yes |
| Operating System | cisco | ios_xe | 16.10.1d | Yes |
| Operating System | cisco | ios_xe | 16.10.1e | Yes |
| Operating System | cisco | ios_xe | 16.10.1f | Yes |
| Operating System | cisco | ios_xe | 16.10.1g | Yes |
| Operating System | cisco | ios_xe | 16.10.1s | Yes |
| Operating System | cisco | ios_xe | 16.10.2 | Yes |
| Operating System | cisco | ios_xe | 16.10.3 | Yes |
| Operating System | cisco | ios_xe | 16.11.1 | Yes |
| Operating System | cisco | ios_xe | 16.11.1a | Yes |
| Operating System | cisco | ios_xe | 16.11.1b | Yes |
| Operating System | cisco | ios_xe | 16.11.1c | Yes |
| Operating System | cisco | ios_xe | 16.11.1s | Yes |
| Operating System | cisco | ios_xe | 16.11.2 | Yes |
| Operating System | cisco | ios_xe | 16.12.1 | Yes |
| Operating System | cisco | ios_xe | 16.12.1a | Yes |
| Operating System | cisco | ios_xe | 16.12.1c | Yes |
| Operating System | cisco | ios_xe | 16.12.1s | Yes |
| Operating System | cisco | ios_xe | 16.12.1t | Yes |
| Operating System | cisco | ios_xe | 16.12.1w | Yes |
| Operating System | cisco | ios_xe | 16.12.1x | Yes |
| Operating System | cisco | ios_xe | 16.12.1y | Yes |
| Operating System | cisco | ios_xe | 16.12.1z | Yes |
| Operating System | cisco | ios_xe | 16.12.1z1 | Yes |
| Operating System | cisco | ios_xe | 16.12.1z2 | Yes |
| Operating System | cisco | ios_xe | 16.12.2 | Yes |
| Operating System | cisco | ios_xe | 16.12.2a | Yes |
| Operating System | cisco | ios_xe | 16.12.2s | Yes |
| Operating System | cisco | ios_xe | 16.12.2t | Yes |
| Operating System | cisco | ios_xe | 16.12.3 | Yes |
| Operating System | cisco | ios_xe | 16.12.3a | Yes |
| Operating System | cisco | ios_xe | 16.12.3s | Yes |
| Operating System | cisco | ios_xe | 16.12.4 | Yes |
| Operating System | cisco | ios_xe | 16.12.4a | Yes |
| Operating System | cisco | ios_xe | 16.12.5 | Yes |
| Operating System | cisco | ios_xe | 16.12.5a | Yes |
| Operating System | cisco | ios_xe | 16.12.5b | Yes |
| Operating System | cisco | ios_xe | 16.12.6 | Yes |
| Operating System | cisco | ios_xe | 16.12.6a | Yes |
| Operating System | cisco | ios_xe | 16.12.7 | Yes |
| Operating System | cisco | ios_xe | 16.12.8 | Yes |
| Operating System | cisco | ios_xe | 16.12.9 | Yes |
| Operating System | cisco | ios_xe | 16.12.10 | Yes |
| Operating System | cisco | ios_xe | 16.12.10a | Yes |
| Operating System | cisco | ios_xe | 16.12.11 | Yes |
| Operating System | cisco | ios_xe | 16.12.12 | Yes |
| Operating System | cisco | ios_xe | 16.12.13 | Yes |
| Operating System | cisco | ios_xe | 16.12.14 | Yes |
| Operating System | cisco | ios_xe | 16.12.15 | Yes |
| Operating System | cisco | ios_xe | 16.12.16 | Yes |
| Operating System | cisco | ios_xe | 17.1.1 | Yes |
| Operating System | cisco | ios_xe | 17.1.1a | Yes |
| Operating System | cisco | ios_xe | 17.1.1s | Yes |
| Operating System | cisco | ios_xe | 17.1.1t | Yes |
| Operating System | cisco | ios_xe | 17.1.2 | Yes |
| Operating System | cisco | ios_xe | 17.1.3 | Yes |
| Operating System | cisco | ios_xe | 17.2.1 | Yes |
| Operating System | cisco | ios_xe | 17.2.1a | Yes |
| Operating System | cisco | ios_xe | 17.2.1r | Yes |
| Operating System | cisco | ios_xe | 17.2.1v | Yes |
| Operating System | cisco | ios_xe | 17.2.2 | Yes |
| Operating System | cisco | ios_xe | 17.2.3 | Yes |
| Operating System | cisco | ios_xe | 17.3.1 | Yes |
| Operating System | cisco | ios_xe | 17.3.1a | Yes |
| Operating System | cisco | ios_xe | 17.3.1w | Yes |
| Operating System | cisco | ios_xe | 17.3.1x | Yes |
| Operating System | cisco | ios_xe | 17.3.1z | Yes |
| Operating System | cisco | ios_xe | 17.3.2 | Yes |
| Operating System | cisco | ios_xe | 17.3.2a | Yes |
| Operating System | cisco | ios_xe | 17.3.3 | Yes |
| Operating System | cisco | ios_xe | 17.3.3a | Yes |
| Operating System | cisco | ios_xe | 17.3.4 | Yes |
| Operating System | cisco | ios_xe | 17.3.4a | Yes |
| Operating System | cisco | ios_xe | 17.3.4b | Yes |
| Operating System | cisco | ios_xe | 17.3.4c | Yes |
| Operating System | cisco | ios_xe | 17.3.5 | Yes |
| Operating System | cisco | ios_xe | 17.3.5a | Yes |
| Operating System | cisco | ios_xe | 17.3.5b | Yes |
| Operating System | cisco | ios_xe | 17.3.6 | Yes |
| Operating System | cisco | ios_xe | 17.3.7 | Yes |
| Operating System | cisco | ios_xe | 17.3.8 | Yes |
| Operating System | cisco | ios_xe | 17.3.8a | Yes |
| Operating System | cisco | ios_xe | 17.4.1 | Yes |
| Operating System | cisco | ios_xe | 17.4.1a | Yes |
| Operating System | cisco | ios_xe | 17.4.1b | Yes |
| Operating System | cisco | ios_xe | 17.4.1c | Yes |
| Operating System | cisco | ios_xe | 17.4.2 | Yes |
| Operating System | cisco | ios_xe | 17.4.2a | Yes |
| Operating System | cisco | ios_xe | 17.5.1 | Yes |
| Operating System | cisco | ios_xe | 17.5.1a | Yes |
| Operating System | cisco | ios_xe | 17.6.1 | Yes |
| Operating System | cisco | ios_xe | 17.6.1a | Yes |
| Operating System | cisco | ios_xe | 17.6.1x | Yes |
| Operating System | cisco | ios_xe | 17.6.1z | Yes |
| Operating System | cisco | ios_xe | 17.6.1z1 | Yes |
| Operating System | cisco | ios_xe | 17.6.2 | Yes |
| Operating System | cisco | ios_xe | 17.6.3 | Yes |
| Operating System | cisco | ios_xe | 17.6.3a | Yes |
| Operating System | cisco | ios_xe | 17.6.4 | Yes |
| Operating System | cisco | ios_xe | 17.6.5 | Yes |
| Operating System | cisco | ios_xe | 17.6.5a | Yes |
| Operating System | cisco | ios_xe | 17.6.6 | Yes |
| Operating System | cisco | ios_xe | 17.6.6a | Yes |
| Operating System | cisco | ios_xe | 17.6.7 | Yes |
| Operating System | cisco | ios_xe | 17.6.8 | Yes |
| Operating System | cisco | ios_xe | 17.6.8a | Yes |
| Operating System | cisco | ios_xe | 17.7.1 | Yes |
| Operating System | cisco | ios_xe | 17.7.1a | Yes |
| Operating System | cisco | ios_xe | 17.7.1b | Yes |
| Operating System | cisco | ios_xe | 17.7.2 | Yes |
| Operating System | cisco | ios_xe | 17.8.1 | Yes |
| Operating System | cisco | ios_xe | 17.8.1a | Yes |
| Operating System | cisco | ios_xe | 17.9.1 | Yes |
| Operating System | cisco | ios_xe | 17.9.1a | Yes |
| Operating System | cisco | ios_xe | 17.9.1w | Yes |
| Operating System | cisco | ios_xe | 17.9.1x | Yes |
| Operating System | cisco | ios_xe | 17.9.1x1 | Yes |
| Operating System | cisco | ios_xe | 17.9.1y | Yes |
| Operating System | cisco | ios_xe | 17.9.1y1 | Yes |
| Operating System | cisco | ios_xe | 17.9.2 | Yes |
| Operating System | cisco | ios_xe | 17.9.2a | Yes |
| Operating System | cisco | ios_xe | 17.9.3 | Yes |
| Operating System | cisco | ios_xe | 17.9.3a | Yes |
| Operating System | cisco | ios_xe | 17.9.4 | Yes |
| Operating System | cisco | ios_xe | 17.9.4a | Yes |
| Operating System | cisco | ios_xe | 17.9.5 | Yes |
| Operating System | cisco | ios_xe | 17.9.5a | Yes |
| Operating System | cisco | ios_xe | 17.9.5b | Yes |
| Operating System | cisco | ios_xe | 17.9.5c | Yes |
| Operating System | cisco | ios_xe | 17.9.5d | Yes |
| Operating System | cisco | ios_xe | 17.9.5e | Yes |
| Operating System | cisco | ios_xe | 17.9.5f | Yes |
| Operating System | cisco | ios_xe | 17.9.6 | Yes |
| Operating System | cisco | ios_xe | 17.9.6a | Yes |
| Operating System | cisco | ios_xe | 17.9.7 | Yes |
| Operating System | cisco | ios_xe | 17.9.7a | Yes |
| Operating System | cisco | ios_xe | 17.9.7b | Yes |
| Operating System | cisco | ios_xe | 17.9.8 | Yes |
| Operating System | cisco | ios_xe | 17.9.9 | Yes |
| Operating System | cisco | ios_xe | 17.10.1 | Yes |
| Operating System | cisco | ios_xe | 17.10.1a | Yes |
| Operating System | cisco | ios_xe | 17.10.1b | Yes |
| Operating System | cisco | ios_xe | 17.11.1 | Yes |
| Operating System | cisco | ios_xe | 17.11.1a | Yes |
| Operating System | cisco | ios_xe | 17.12.1 | Yes |
| Operating System | cisco | ios_xe | 17.12.1a | Yes |
| Operating System | cisco | ios_xe | 17.12.1w | Yes |
| Operating System | cisco | ios_xe | 17.12.1x | Yes |
| Operating System | cisco | ios_xe | 17.12.1y | Yes |
| Operating System | cisco | ios_xe | 17.12.1z | Yes |
| Operating System | cisco | ios_xe | 17.12.1z1 | Yes |
| Operating System | cisco | ios_xe | 17.12.1z2 | Yes |
| Operating System | cisco | ios_xe | 17.12.1z3 | Yes |
| Operating System | cisco | ios_xe | 17.12.1z4 | Yes |
| Operating System | cisco | ios_xe | 17.12.1z5 | Yes |
| Operating System | cisco | ios_xe | 17.12.1z6 | Yes |
| Operating System | cisco | ios_xe | 17.12.2 | Yes |
| Operating System | cisco | ios_xe | 17.12.2a | Yes |
| Operating System | cisco | ios_xe | 17.12.3 | Yes |
| Operating System | cisco | ios_xe | 17.12.3a | Yes |
| Operating System | cisco | ios_xe | 17.12.4 | Yes |
| Operating System | cisco | ios_xe | 17.12.4a | Yes |
| Operating System | cisco | ios_xe | 17.12.4b | Yes |
| Operating System | cisco | ios_xe | 17.12.5 | Yes |
| Operating System | cisco | ios_xe | 17.12.5a | Yes |
| Operating System | cisco | ios_xe | 17.12.5b | Yes |
| Operating System | cisco | ios_xe | 17.12.5c | Yes |
| Operating System | cisco | ios_xe | 17.12.5d | Yes |
| Operating System | cisco | ios_xe | 17.12.6 | Yes |
| Operating System | cisco | ios_xe | 17.12.6a | Yes |
| Operating System | cisco | ios_xe | 17.12.6b | Yes |
| Operating System | cisco | ios_xe | 17.12.7 | Yes |
| Operating System | cisco | ios_xe | 17.12.7a | Yes |
| Operating System | cisco | ios_xe | 17.12.7b | Yes |
| Operating System | cisco | ios_xe | 17.13.1 | Yes |
| Operating System | cisco | ios_xe | 17.13.1a | Yes |
| Operating System | cisco | ios_xe | 17.14.1 | Yes |
| Operating System | cisco | ios_xe | 17.14.1a | Yes |
| Operating System | cisco | ios_xe | 17.15.1 | Yes |
| Operating System | cisco | ios_xe | 17.15.1a | Yes |
| Operating System | cisco | ios_xe | 17.15.1b | Yes |
| Operating System | cisco | ios_xe | 17.15.1w | Yes |
| Operating System | cisco | ios_xe | 17.15.1x | Yes |
| Operating System | cisco | ios_xe | 17.15.1y | Yes |
| Operating System | cisco | ios_xe | 17.15.2 | Yes |
| Operating System | cisco | ios_xe | 17.15.2a | Yes |
| Operating System | cisco | ios_xe | 17.15.2b | Yes |
| Operating System | cisco | ios_xe | 17.15.2c | Yes |
| Operating System | cisco | ios_xe | 17.15.3 | Yes |
| Operating System | cisco | ios_xe | 17.15.3a | Yes |
| Operating System | cisco | ios_xe | 17.15.3b | Yes |
| Operating System | cisco | ios_xe | 17.15.4 | Yes |
| Operating System | cisco | ios_xe | 17.15.4a | Yes |
| Operating System | cisco | ios_xe | 17.15.4b | Yes |
| Operating System | cisco | ios_xe | 17.15.4c | Yes |
| Operating System | cisco | ios_xe | 17.15.4d | Yes |
| Operating System | cisco | ios_xe | 17.15.4s1 | Yes |
| Operating System | cisco | ios_xe | 17.15.5 | Yes |
| Operating System | cisco | ios_xe | 17.15.5a | Yes |
| Operating System | cisco | ios_xe | 17.15.7 | Yes |
| Operating System | cisco | ios_xe | 17.16.1 | Yes |
| Operating System | cisco | ios_xe | 17.16.1a | Yes |
| Operating System | cisco | ios_xe | 17.17.1 | Yes |
| Operating System | cisco | ios_xe | 17.18.1a | Yes |
| Operating System | cisco | ios_xe | 17.18.1w | Yes |
| Operating System | cisco | ios_xe | 17.18.1x | Yes |
| Operating System | cisco | ios_xe | 17.18.1y | Yes |
| Operating System | cisco | ios_xe | 17.18.1z | Yes |
| Operating System | cisco | ios_xe | 17.18.2 | Yes |
| Operating System | cisco | ios_xe | 17.18.3 | Yes |
| Operating System | cisco | ios_xe | 17.18.3a | Yes |
| Operating System | cisco | ios_xe | 26.1.1 | Yes |
| Operating System | cisco | ios_xe | 26.1.1a | 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.