CVE-2026-20308
Cisco IOS XE Software Web-Based Management Interface Vulnerability
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to perform a denial of service (DoS) attack against an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web-based management interface of an affected device. A successful exploit could allow the attacker to cause the web-based management interface to become unresponsive.
| CWE | CWE-269 |
| Vendor | cisco |
| Product | cisco ios xe software |
| Ecosystems | |
| Industries | NetworkingTelecommunications |
| Published | Aug 5, 2026 |
| Last Updated | Aug 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
Cisco / Cisco IOS XE Software
17.2.1a 16.12.1y 16.12.3s 16.12.1w 16.9.1d 17.3.1 16.9.4c 17.2.1 16.9.1b 16.9.2s 16.12.4 16.12.3a 17.1.1s 16.11.1a 16.11.1b 16.9.1s 16.9.3h 16.9.1c 16.10.1f 17.2.1v 16.9.3a 16.12.1a 16.12.1x 16.10.1c 16.12.3 16.11.2 16.12.2s 16.10.1b 16.9.6 16.9.2 16.10.1 16.12.1t 16.9.1 16.9.3s 16.12.2 16.11.1 16.9.3 16.11.1s 16.12.1 17.1.1 17.1.2 16.10.1d 17.1.1t 16.9.4 16.12.2t 16.9.5 16.10.1e 16.10.1a 16.12.1z 16.9.1a 16.9.5f 16.10.1g 16.9.2a 16.10.3 16.11.1c 16.10.1s 17.2.1r 17.1.1a 16.10.2 16.12.2a 16.12.1c 16.12.1s 17.2.2 16.9.8 16.9.7 17.1.3 17.3.1a 17.3.2a 16.12.5 17.3.1w 17.3.2 17.4.1 16.12.4a 17.4.1a 17.3.1x 17.3.3 17.2.3 17.5.1 16.12.1z1 16.12.5a 17.4.1b 17.3.1z 16.12.5b 17.4.2 17.3.3a 17.3.5 17.3.4 17.5.1a 16.12.6 17.6.1 16.12.1z2 17.3.4a 17.6.1a 17.7.1 17.6.1x 17.6.2 16.12.6a 17.3.4c 17.4.2a 17.3.4b 17.7.1a 16.12.7 17.8.1a 17.6.3a 17.6.3 17.7.2 17.7.1b 17.9.1w 17.3.5a 17.6.1z 16.12.8 17.8.1 17.9.1 17.6.4 17.3.5b 17.9.1a 17.3.6 17.10.1 16.9.8a 17.6.1z1 17.10.1a 17.9.2 17.6.5 17.9.1x 17.9.1y 16.9.8b 17.3.7 17.9.2a 17.9.3 16.12.9 17.11.1 17.10.1b 17.6.6 17.9.1x1 17.11.1a 17.9.3a 17.12.1 17.3.8 17.9.4 16.12.10 17.12.1w 17.9.1y1 17.12.1a 17.9.5 17.13.1 17.12.1x 17.12.2 17.14.1 17.9.4a 17.3.8a 17.6.6a 17.6.5a 17.6.7 16.12.10a 17.15.1 17.13.1a 17.12.2a 16.12.11 17.12.3 17.12.1y 17.12.1z 17.9.5a 17.14.1a 17.9.5b 17.6.8 16.12.12 17.12.4 17.9.6 17.17.1 17.16.1 17.15.1w 17.12.3a 17.9.5c 17.15.1a 17.12.1z1 17.15.2 17.15.1b 17.9.5d 17.15.1x 17.9.6a 17.12.1z2 17.6.8a 17.16.1a 16.12.13 17.15.3 17.9.7 17.12.5 17.15.1y 17.9.5e 17.12.4a 17.15.2a 17.15.2c 17.15.2b 17.12.1z3 17.9.5f 17.12.4b 17.12.5a 17.18.1 17.12.6 17.12.1z4 17.9.8 17.9.7a 17.15.3a 17.15.4 17.12.5b 17.15.3b 16.12.14 17.18.1z 17.9.7b 17.12.5c 26.1.1 17.18.1a 17.15.4a 17.18.2 17.18.1w 17.15.4b 17.12.6a 17.12.7 17.15.4c 17.9.9 17.12.5d 16.12.15 17.15.4s1 17.15.5 17.12.1z5 17.18.1x 17.12.1z6 17.15.4d 17.12.6b 17.4.1c 17.15.5a 17.18.1y 17.12.7a 17.18.3 17.12.7b 17.18.3a 26.1.1a 26.2.1ea 16.12.16