CVE-2020-27121— Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerability
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I. Basic Information for CVE-2020-27121
Vulnerability Information
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Vulnerability Title
Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
未捕获的异常
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Unified Communications Manager 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Unified Communications Manager（CUCM，Unified CM，CallManager）是美国思科（Cisco）公司的一款统一通信系统中的呼叫处理组件。该组件提供了一种可扩展、可分布和高可用的企业IP电话呼叫处理解决方案。 Cisco Unified Communications Manager IM 和 Presence Service的XCP 存在安全漏洞，该漏洞可触发致命错误，以导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco Unified Communications Manager IM and Presence Service | n/a | - |
II. Public POCs for CVE-2020-27121
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|---|
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- Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerabilityvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2020-27121
Same Patch Batch · Cisco · 2020-11-06 · 27 CVEs total
| CVE-2020-3603 | 7.8 HIGH | Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne |
| CVE-2020-3573 | 7.8 HIGH | Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne |
| CVE-2020-3593 | 7.8 HIGH | Cisco SD-WAN Software Privilege Escalation Vulnerability |
| CVE-2020-3594 | 7.8 HIGH | Cisco SD-WAN Software Privilege Escalation Vulnerability |
| CVE-2020-3600 | 7.8 HIGH | Cisco SD-WAN Software Privilege Escalation Vulnerability |
| CVE-2020-3604 | 7.8 HIGH | Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne |
| CVE-2020-3595 | 7.8 HIGH | Cisco SD-WAN Software Privilege Escalation Vulnerability |
| CVE-2020-3574 | 7.5 HIGH | Cisco IP Phone TCP Packet Flood Denial of Service Vulnerability |
| CVE-2020-3588 | 7.3 HIGH | Cisco Webex Meetings Desktop App Arbitrary Code Execution Vulnerability |
| CVE-2020-3556 | 7.3 HIGH | Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution Vulnerability |
| CVE-2020-27129 | 6.7 MEDIUM | Cisco SD-WAN vManage Software Command Injection Vulnerability |
| CVE-2020-3592 | 6.5 MEDIUM | Cisco SD-WAN vManage Software Authorization Bypass Vulnerability |
| CVE-2020-26084 | 6.5 MEDIUM | Cisco Edge Fog Fabric Resource Exposure Vulnerability |
| CVE-2020-27128 | 6.5 MEDIUM | Cisco SD-WAN vManage Software Arbitrary File Creation Vulnerability |
| CVE-2020-3590 | 6.4 MEDIUM | Cisco SD-WAN vManage Software Cross-Site Scripting Vulnerability |
| CVE-2020-3587 | 6.4 MEDIUM | Cisco SD-WAN vManage Software Cross-Site Scripting Vulnerability |
| CVE-2020-3371 | 6.3 MEDIUM | Cisco Integrated Management Controller Command Injection Vulnerability |
| CVE-2020-3551 | 6.1 MEDIUM | Cisco Identity Services Engine Cross-Site Scripting Vulnerability |
| CVE-2020-27123 | 5.5 MEDIUM | Cisco AnyConnect Secure Mobility Client for Windows Arbitrary File Read Vulnerability |
| CVE-2020-26083 | 4.8 MEDIUM | Cisco Identity Services Engine Cross-Site Scripting Vulnerability |
Showing top 20 of 27 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
- CVE-2025-20330
Cisco Unified Communications Manager IM and Presence Cross-S - CVE-2024-20457
Cisco Unified Communications Manager IM & Presence Service I - CVE-2023-20108
Cisco Unified Communications Manager 安全漏洞 - CVE-2022-20786
Cisco Unified Communications Manager IM & Presence Service S - CVE-2021-1363
Cisco Unified Communications Manager IM & Presence Service S
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V. Comments for CVE-2020-27121
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