CVE-2026-20125
Published: Mar 25, 2026
Modified: Mar 25, 2026
CVSS v3.1
7.7
Description
A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an authenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending malformed HTTP requests to an affected device. A successful exploit could allow the attacker to cause a watchdog timer to expire and the device to reload, resulting in a DoS condition. To exploit this vulnerability, the attacker must have a valid user account.
| Vendor | Product | Versions |
|---|---|---|
Cisco | IOS | affected 12.2(33)CYaffected 12.2(33)CY1affected 12.2(33)CY2affected 12.2(55)SEaffected 12.2(55)SE3+938 more versions |
Cisco | Cisco IOS XE Software | affected 3.5.0Eaffected 3.5.1Eaffected 3.5.2Eaffected 3.5.3Eaffected 3.11.1S+152 more versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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