{"id":50947,"date":"2025-06-10T22:20:18","date_gmt":"2025-06-10T22:20:18","guid":{"rendered":""},"modified":"2025-09-03T03:29:05","modified_gmt":"2025-09-03T09:29:05","slug":"cve-2025-2025-20261-critical-vulnerability-in-cisco-imc-ssh-connection-handling","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-2025-20261-critical-vulnerability-in-cisco-imc-ssh-connection-handling\/","title":{"rendered":"CVE-2025-2025-20261: Critical Vulnerability in Cisco IMC SSH Connection Handling<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The Common Vulnerabilities and Exposures (CVE) system has recently identified a critical vulnerability, CVE-2025-20261, affecting the SSH connection handling of Cisco IMC for various Cisco UCS servers.
\nThis vulnerability is of significant concern due to the potential for an authenticated, remote attacker to gain unauthorized access to internal services with elevated privileges. By exploiting this vulnerability, an attacker could potentially modify system configurations, create new administrator accounts, or even compromise system integrity, leading to potential data<\/a> leakage.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-20261
\nSeverity: Critical (CVSS 8.8)
\nAttack Vector: Network
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: Unauthorized access to internal services with elevated privileges<\/a>, unauthorized system modifications and potential system compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Cisco Integrated Management<\/a> Controller (IMC) for Cisco UCS B-Series | All versions
\nCisco Integrated Management<\/a> Controller (IMC) for Cisco UCS C-Series | All versions
\nCisco Integrated Management Controller (IMC) for Cisco UCS S-Series | All versions
\nCisco Integrated Management Controller (IMC) for Cisco UCS X-Series Servers<\/a> | All versions<\/p>\n

How the Exploit Works<\/strong><\/p>\n

This vulnerability arises due<\/a> to an insufficiency in the restrictions on access to internal services within Cisco IMC. An attacker, with a valid user account, can exploit this vulnerability by using specially crafted syntax while connecting to the Cisco IMC<\/a> of an affected device through SSH. Successful exploitation could result in the attacker gaining access to internal services with elevated privileges<\/a>.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

The following is a conceptual example of how the vulnerability might be exploited:<\/p>\n

ssh user@target.example.com\nPassword: \n<\/strong>\n\n$ echo \"Crafted Syntax\" | nc localhost internal_service_port<\/code><\/pre>\n
In this conceptual example, the attacker connects to the target device via SSH and uses the ‘netcat’ command<\/a> (nc) to send a specially crafted syntax to the internal service running on the ‘internal_service_port. The ‘crafted syntax’ would be designed to exploit the vulnerability and gain unauthorized access with elevated privileges<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The Common Vulnerabilities and Exposures (CVE) system has recently identified a critical vulnerability, CVE-2025-20261, affecting the SSH connection handling of Cisco IMC for various Cisco UCS servers. This vulnerability is of significant concern due to the potential for an authenticated, remote attacker to gain unauthorized access to internal services with elevated privileges. By exploiting […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[96],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-50947","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-cisco"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t