CVE-2020-27121
4.3 · MEDIUMOverview
CVE-2020-27121 is a medium-severity vulnerability affecting cisco unified_communications_manager_im_and_presence_service. It was published on November 6, 2020 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
A vulnerability in Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) Software could allow an authenticated, remote attacker to cause the Cisco XCP Authentication Service on an affected device to restart, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of login requests. An attacker could exploit this vulnerability by sending a crafted client login request to an affected device. A successful exploit could allow the attacker to cause a process to crash, resulting in a DoS condition for new login attempts. Users who are authenticated at the time of the attack would not be affected. There are workarounds that address this vulnerability.
Remediation
Check the references section for vendor advisories and patches from cisco. Update unified_communications_manager_im_and_presence_service to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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Frequently Asked Questions
What is CVE-2020-27121?
CVE-2020-27121 is a medium-severity vulnerability affecting cisco unified_communications_manager_im_and_presence_service. It was published on November 6, 2020 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
How severe is CVE-2020-27121?
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2020-27121?
Check the references section for vendor advisories and patches from cisco. Update unified_communications_manager_im_and_presence_service to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-27121?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-27121 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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