Is CVE-2025-20261 actively exploited?

No active exploitation of CVE-2025-20261 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-20261 be exploited remotely?

Yes. CVE-2025-20261 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-20261?

CVE-2025-20261 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2025-20261

CWE-923Published: June 4, 2025· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

A vulnerability in the SSH connection handling of Cisco Integrated Management Controller (IMC) for Cisco UCS B-Series, UCS C-Series, UCS S-Series, and UCS X-Series Servers could allow an authenticated, remote attacker to access internal services with elevated privileges.

This vulnerability is due to insufficient restrictions on access to internal services. An attacker with a valid user account could exploit this vulnerability by using crafted syntax when connecting to the Cisco IMC of an affected device through SSH. A successful exploit could allow the attacker to access internal services with elevated privileges, which may allow unauthorized modifications to the system, including the possibility of creating new administrator accounts on the affected device.

NVD Source

Technical Analysis

CVE-2025-20261 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.