CVE-2026-20093 — Cisco Integrated Management Controller
As of 2026-04-08, CVE-2026-20093 is a CRITICAL-severity vulnerability in Cisco Integrated Management Controller, CVSS v3.1 9.8, EPSS 0.0% (8.0th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-20093, most recently “CVE-2026-20093: Cisco IMC Authentication Bypass — Unauthenticated Admin Access via Password Change Manipulation”.
Last updated: 2026-04-08
What is CVE-2026-20093?
Critical authentication bypass vulnerability (CVSS 9.8) in Cisco Integrated Management Controller (IMC) allows unauthenticated remote attackers to bypass authentication and gain full administrative access. The flaw resides in improper input validation (CWE-20) in the password change functionality of the IMC web interface and XML API. The system fails to validate the authorization context during password modification requests before processing backend database updates. An unauthenticated attacker can craft an XML POST request targeting the configConfMo method with the aaaUser object class, manipulating the default admin account Distinguished Name (DN) at sys/user-ext/user-admin, allowing direct credential manipulation without a valid authenticated session. Through the IMC management interface (accessible via XML API, WebUI, and CLI), an attacker with admin access can control server hardware, modify BIOS settings, access virtual media, monitor hardware health, and potentially pivot to managed workloads. Disclosed by Cisco PSIRT on April 1, 2026. Discovered by security researcher jyh.
The record classifies CVE-2026-20093 under weakness class CWE-20. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 11 affected-product entries are recorded, across 2 vendors, listed below. The identifier was first published 164 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 0.0% probability of exploitation in the next 30 days, higher than 8.0% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 5.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-04-01, last modified 2026-04-08
Is CVE-2026-20093 being exploited?
It currently carries a trending score of 7 in the Threadlinqs vulnerability feed.
Affected products and versions
- Cisco: Integrated Management Controller
- (vendor unspecified): Cisco UCS C-Series M5 Rack Servers, Cisco UCS C-Series M6 Rack Servers, Cisco UCS E-Series M3 Servers, Cisco UCS E-Series M6 Servers, Cisco 5000 Series ENCS, Cisco Catalyst 8300 Series Edge uCPE, Cisco APIC Servers (dependent), Cisco Cyber Vision Center Appliances (dependent), Cisco Secure Firewall Management Center Appliances (dependent), Cisco Malware Analytics Appliances (dependent)
How to fix CVE-2026-20093
The record marks a vendor fix as available for CVE-2026-20093. Vendor advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cimc-auth-bypass-AgG2BxTn. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-20093
1 tracked threat in the Threadlinqs corpus references CVE-2026-20093, either in the campaign’s CVE list or as an indicator on the campaign record.
- CVE-2026-20093: Cisco IMC Authentication Bypass — Unauthenticated Admin Access via Password Change Manipulation — CRITICAL · 2026-04-04
Sources
Seeded from threat-derived and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.
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