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CVE-2026-20200 is a high-severity argument injection vulnerability in the web-based management interface of Cisco Integrated Management Controller (IMC), affecting Cisco Unified Computing System standalone deployments. The flaw is caused by improper validation of user-supplied input, allowing attacker-controlled input submitted through the management interface to be interpreted as command arguments by the underlying operating system. A remote attacker who is authenticated to the IMC interface with low privileges can exploit the issue by supplying crafted input, resulting in arbitrary command execution on the managed system. Successful exploitation leads to execution in the context of the root user on the underlying operating system, making the issue both a remote code execution and privilege-escalation vulnerability.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
Repository is a standalone Python proof-of-concept exploit for CVE-2026-20200 affecting Cisco CIMC/IMC. The main entry point is CIMCown.py, which orchestrates authentication, host/session enumeration, file upload/download, local payload building, and reverse-shell execution. authentication.py implements Cisco IMC login logic, including client-side password encryption and session extraction. util.py contains the core exploit primitives: authenticated POSTs to CIMC endpoints and crafted JSON-RPC payloads abusing the Redfish OEM action '/redfish/v1/AccountService/Accounts/2/Actions/Oem/ManagerAccount.UploadSSHKey' by injecting curl arguments into the KeyURI field. This enables three main capabilities: arbitrary file read (target POSTs local file contents to attacker HTTP server), arbitrary file write (target downloads attacker-hosted file to arbitrary path), and code execution (target curl loads a malicious shared library via '--engine'). fileserver.py provides a custom local HTTP server used to host payloads and receive exfiltrated files, including support for malformed/no-Content-Length POSTs from the target. The shell directory contains a Go reverse shell template that is rebuilt with attacker IP/port and cross-compiled for ARM; util.py also includes a helper to build an ARM shared object that executes '/tmp/main'. Overall, this is a real exploit repository with operational RCE and file-transfer functionality, not merely a detector.
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22 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity vulnerability in Cisco Integrated Management Controller that is described as enabling a root-level attack.
A high-severity improper validation of user-supplied input vulnerability in Cisco Integrated Management Controller (IMC) that could allow an authenticated low-privilege remote attacker to execute arbitrary commands on the underlying OS and elevate privileges to root.
An argument injection vulnerability in the web management interface of Cisco Integrated Management Controller (IMC) that could allow a low-privileged authenticated remote attacker to execute arbitrary commands with elevated privileges on the underlying operating system.
A critical authenticated remote command execution vulnerability in Cisco Integrated Management Controller (IMC) web interface that can allow low-privileged attackers to execute arbitrary commands as root on the underlying operating system.
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.