CVE-2026-20311
Last modified
CVE-2026-20311 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient error handling in the web-based management interface. An attacker could exploit this vulnerability by authenticating with a malformed certificate. EPSS estimates a 0.16% chance of exploitation in the next 30 days.
Description
A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient error handling in the web-based management interface. An attacker could exploit this vulnerability by authenticating with a malformed certificate. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Metrics
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco IOS XE Software | 17.3.1; 17.3.1a; 17.3.2a; 17.3.1w; 17.3.2; 17.4.1; 17.4.1a; 17.3.1x; 17.3.3; 17.5.1; 17.4.1b; 17.3.1z; 17.4.2; 17.3.3a; 17.3.5; 17.3.4; 17.5.1a; 17.6.1; 17.3.4a; 17.6.1a; 17.7.1; 17.6.1x; 17.6.2; 17.3.4c; 17.4.2a; 17.3.4b; 17.7.1a; 17.8.1a; 17.6.3a; 17.6.3; 17.7.2; 17.7.1b; 17.9.1w; 17.3.5a; 17.6.1z; 17.8.1; 17.9.1; 17.6.4; 17.3.5b; 17.9.1a; 17.3.6; 17.10.1; 17.6.1z1; 17.10.1a; 17.9.2; 17.6.5; 17.9.1x; 17.9.1y; 17.3.7; 17.9.2a; 17.9.3; 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; 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; 17.15.1; 17.13.1a; 17.12.2a; 17.12.3; 17.12.1y; 17.12.1z; 17.9.5a; 17.14.1a; 17.9.5b; 17.6.8; 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; 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; 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; 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 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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