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Vulnerability record · CVE-2022-20625 · published 23 February 2022

CVE-2022-20625: Cisco firepower extensible operating system vulnerability

Cisco · Firepower Extensible Operating System

A vulnerability in the Cisco Discovery Protocol service of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause the service to restart, resulting in a denial of service (DoS) condition. This vulnerability is due to improper handling of Cisco Discovery Protocol messages that are processed by the Cisco Discovery Protocol service. An attacker could exploit this vulnerability by sending a series of malicious Cisco Discovery Protocol messages to an affected device. A successful exploit could allow the attacker to cause the Cisco Discovery Protocol service to fail and restart. In rare conditions, repeated failures of the process could occur, which could cause the entire device to restart.

4.3 CVSS 3.1 Medium EPSS 3.3% · top 12.1% CWE-399 · CWE-399
4.3CVSS 3.1 base score, v2 6.1
3.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A vulnerability in the Cisco Discovery Protocol service of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause the service to restart, resulting in a denial of service (DoS) condition. This vulnerability is due to improper handling of Cisco Discovery Protocol messages that are processed by the Cisco Discovery Protocol service. An attacker could exploit this vulnerability by sending a series of malicious Cisco Discovery Protocol messages to an affected device. A successful exploit could allow the attacker to cause the Cisco Discovery Protocol service to fail and restart. In rare conditions, repeated failures of the process could occur, which could cause the entire device to restart.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cdp-dos-G8DPLWYG Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cdp-dos-G8DPLWYG Vendor Advisory

Track CVE-2022-20625 inside VULONE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

6.7CVE-2024-20399Cisco NX-OS CLI command injection allows root command executionCisco NX-OS fails to properly validate arguments passed to specific configuration CLI commands, allowing OS command injection. An attacker who alread…KEVEPSS 4.3%analysed9.8CVE-2018-0310Cisco nx-os out-of-bounds read vulnerabilityA vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacke…EPSS 4.1%9.8CVE-2018-0301Cisco nx-os improper input validation vulnerabilityA vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to craft a packet to the management int…EPSS 17%9.8CVE-2016-1453Cisco nx-os memory buffer overflow vulnerabilityBuffer overflow in the Overlay Transport Virtualization (OTV) GRE feature in Cisco NX-OS 5.0 through 7.3 on Nexus 7000 and 7700 devices allows remote…EPSS 8.1%9.8CVE-2016-1341Cisco nx-os permissions and access controls vulnerabilityCisco NX-OS 7.0(1)N1(1), 7.0(1)N1(3), and 7.0(4)N1(1) on Nexus 2000 Fabric Extender devices has a blank root password, which allows local users to ga…EPSS 1.1%9.8CVE-2015-6435Cisco firepower extensible operating system os command injection vulnerabilityAn unspecified CGI script in Cisco FX-OS before 1.1.2 on Firepower 9000 devices and Cisco Unified Computing System (UCS) Manager before 2.2(4b), 2.2(…EPSS 8.7%9.1CVE-2021-1361Cisco nx-os vulnerabilityA vulnerability in the implementation of an internal file management service for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switche…EPSS 1.6%9.0CVE-2015-4235Cisco application policy infrastructure controller \(apic\) permissions and access controls vulnerabilityCisco Application Policy Infrastructure Controller (APIC) devices with software before 1.0(3o) and 1.1 before 1.1(1j) and Nexus 9000 ACI devices with…EPSS 2.2%

Source: NIST National Vulnerability Database (record CVE-2022-20625), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.