Security readout for executives and security teams
CVE-2021-1531 lets a logged-in attacker abuse Cisco Modeling Labs' web UI to run operating-system commands on the CML server. Because successful exploitation can affect confidentiality, integrity, and availability, it is high risk where CML is reachable by users beyond trusted administrators. Exposure is most likely on Cisco Modeling Labs servers with web UI access available to broad internal networks, labs, contractors, or internet-adjacent management paths. Valid web UI credentials are required, so account compromise and weak access controls materially increase risk. Prioritize remediation for any CML server reachable by many users or connected to sensitive lab infrastructure. The credential requirement reduces opportunistic risk, but successful exploitation gives command execution on the server and can become a foothold after account compromise. Mitigation focus: Follow Cisco's advisory for fixed software and official remediation guidance.; Restrict CML web UI access to trusted administrator networks or VPN paths.; Review CML web UI accounts and remove unnecessary or shared access..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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CWE-88: Command execution behavior lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-1531 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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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:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20210519 Cisco Modeling Labs Web UI Command Injection VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
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.
Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.