CVE-2026-20113

A vulnerability in the web-based Cisco IOx application hosting environment management interface of Cisco IOS XE Software could allow an unauthenticated, remote attacker to perform a carriage return line feed (CRLF) injection attack against a user. This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by sending crafted packets to an affected device. A successful exploit could allow the attacker to arbitrarily inject log entries, manipulate the structure of log files, or obscure legitimate log events.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-crlf-NvgKTKJZ

Configurations

No configuration.

History

17 Jun 2026, 10:17

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad en la interfaz de gestión del entorno de alojamiento de aplicaciones Cisco IOx basada en web de Cisco IOS XE Software podría permitir a un atacante remoto no autenticado realizar un ataque de inyección de retorno de carro y salto de línea (CRLF) contra un usuario. Esta vulnerabilidad se debe a una validación insuficiente de la entrada del usuario. Un atacante podría explotar esta vulnerabilidad enviando paquetes manipulados a un dispositivo afectado. Un exploit exitoso podría permitir al atacante inyectar arbitrariamente entradas de registro, manipular la estructura de los archivos de registro u ocultar eventos de registro legítimos.

25 Mar 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-25 16:16

Updated : 2026-06-17 10:17

NVD link : CVE-2026-20113

Mitre link : CVE-2026-20113

CVE.ORG link : CVE-2026-20113

JSON object : View

Products Affected

No product.

CWE

CWE-93

Improper Neutralization of CRLF Sequences ('CRLF Injection')

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"17.15.4"}, {"status": "affected", "version": "17.15.3b"}, {"status": "affected", "version": "17.15.4d"}, {"status": "affected", "version": "17.15.4e"}, {"status": "affected", "version": "17.16.1"}, {"status": "affected", "version": "17.16.1a"}, {"status": "affected", "version": "17.17.1"}, {"status": "affected", "version": "17.18.1"}, {"status": "affected", "version": "17.18.1w"}, {"status": "affected", "version": "17.18.1a"}, {"status": "affected", "version": "17.18.1x"}]}]}], "published": "2026-03-25T16:16:15.637", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-crlf-NvgKTKJZ", "source": "psirt@cisco.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-93"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the web-based Cisco IOx application hosting environment management interface of Cisco IOS XE Software could allow an unauthenticated, remote attacker to perform a carriage return line feed (CRLF) injection attack against a user.\r\n\r This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by sending crafted packets to an affected device. A successful exploit could allow the attacker to arbitrarily inject log entries, manipulate the structure of log files, or obscure legitimate log events."}, {"lang": "es", "value": "Una vulnerabilidad en la interfaz de gesti\u00f3n del entorno de alojamiento de aplicaciones Cisco IOx basada en web de Cisco IOS XE Software podr\u00eda permitir a un atacante remoto no autenticado realizar un ataque de inyecci\u00f3n de retorno de carro y salto de l\u00ednea (CRLF) contra un usuario. Esta vulnerabilidad se debe a una validaci\u00f3n insuficiente de la entrada del usuario. Un atacante podr\u00eda explotar esta vulnerabilidad enviando paquetes manipulados a un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante inyectar arbitrariamente entradas de registro, manipular la estructura de los archivos de registro u ocultar eventos de registro leg\u00edtimos."}], "lastModified": "2026-06-17T10:17:08.077", "sourceIdentifier": "psirt@cisco.com"}