Is CVE-2023-20259 actively exploited?

CVE-2023-20259 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2023-20259?

CVE-2023-20259 has a CVSS score of 8.6 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

How do I patch CVE-2023-20259?

Patch guidance is available from cisco security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-20259.

Fix CVE-2023-20259 - HIGH cisco emergency responder

Q: Which products are affected by CVE-2023-20259?

9 products: cisco emergency responder, cisco prime collaboration deployment, cisco unified communications manager, cisco unified communications manager, cisco unified communications manager, and 4 more.

Description

A vulnerability in an API endpoint of multiple Cisco Unified Communications Products could allow an unauthenticated, remote attacker to cause high CPU utilization, which could impact access to the web-based management interface and cause delays with call processing. This API is not used for device management and is unlikely to be used in normal operations of the device. This vulnerability is due to improper API authentication and incomplete validation of the API request. An attacker could exploit this vulnerability by sending a crafted HTTP request to a specific API on the device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition due to high CPU utilization, which could negatively impact user traffic and management access. When the attack stops, the device will recover without manual intervention.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: changed
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-400NVD-CWE-noinfo

Metadata

Primary Vendor: CISCO
Published: 10/4/2023
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

cisco : emergency_respondercisco : prime_collaboration_deploymentcisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_manager_im_\&_presence_servicecisco : unified_communications_manager_im_\&_presence_servicecisco : unity_connection

Remediation Guidance

Executive Summary

Cite this page

CVE-2023-20259. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2023-20259

View on NIST NVD

CVE-2023-20259 vulnerability