Security readout for executives and security teams
Plain-English summary
CVE-2020-26062 lets an unauthenticated remote attacker confirm whether administrator usernames exist in Cisco Integrated Management Controller. It does not grant access by itself, but it can improve follow-on password guessing, phishing, or credential-stuffing attempts against management interfaces.
Executive priority
Treat as a moderate-priority infrastructure management exposure. It is not a direct system takeover, but it weakens account security on sensitive management planes and should be remediated during normal patch cycles, faster if CIMC is broadly reachable.
Technical view
The issue is a username enumeration flaw caused by different authentication responses during login attempts. Cisco lists it as CWE-203 with CVSS 3.1 score 5.3, network exploitable, low complexity, no privileges, no user interaction, and low confidentiality impact. The source states there are no workarounds.
Likely exposure
Exposure is most relevant where Cisco Unified Computing System (Managed) versions listed in the source run Cisco Integrated Management Controller and the management interface is reachable by untrusted or broad internal networks.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The realistic risk is reconnaissance: attackers can validate administrative usernames, then use that knowledge in later credential attacks against infrastructure management systems.
Researcher notes
Evidence supports unauthenticated remote username enumeration through authentication response differences. The affected version list is specific, but the supplied bundle does not include fixed release details. Avoid claiming exploitation or exploit availability from these sources.
Mitigation direction
- Check Cisco advisory cisco-sa-cimc-enum-CyheP3B7 for fixed software guidance.
- Apply Cisco-recommended updates for affected UCS/CIMC deployments.
- Do not rely on a workaround; the source states none exists.
- Restrict CIMC management access to trusted administration networks.
- Monitor authentication events for unusual username probing patterns.
Validation and detection
- Inventory Cisco Unified Computing System (Managed) deployments using CIMC.
- Compare installed versions with the affected versions in the source bundle.
- Confirm CIMC interfaces are not exposed to the public internet.
- Review authentication logs for repeated failed username discovery patterns.
- Track Cisco advisory status before closing remediation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-203: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-26062 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/RL:X/RC:X/E:X
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/RL:X/RC:X/E:X3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/RL:X/RC:X/E:X
Source materials
- CVE List V5 sourceCVE List V5
- cisco-sa-cimc-enum-CyheP3B7CVE reference
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vsoln-arbfile-gtsEYxnsCVE reference
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-teams-xss-zLW9tD3CVE reference
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanx3-vrZbOqqDCVE reference
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cimc-auth-zWkppJxLCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Observable Discrepancy
Observable Discrepancy represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
