Privilege Escalation in Cisco IMC SSH Connection Handling
CVE-2025-20261 is a privilege escalation vulnerability in the SSH connection handling of Cisco Integrated Management Controller (IMC) affecting Cisco UCS B-Series, C-Series, S-Series, and X-Series Servers, including certain appliances based on preconfigured UCS C-Series servers. The flaw is caused by insufficient restrictions on access to internal services. An authenticated remote attacker with a valid user account can exploit the issue by using crafted syntax when connecting to the Cisco IMC over SSH. Successful exploitation allows access to internal IMC services with elevated privileges, enabling actions beyond the attacker’s intended authorization boundary.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Recent activity
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A privilege escalation vulnerability in Cisco IMC SSH connection handling.
A high-severity Cisco Integrated Management Controller (IMC) vulnerability caused by insufficient restrictions on access to internal services, allowing a logged-in attacker to gain elevated privileges and make unauthorized modifications, including creating new administrative accounts.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.