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TI-2021-01258 Aliases CVE-2021-1531GHSA-m74m-f2xh-459p

Cisco Modeling Labs Web UI Command Injection Vulnerability

Priority HIGH 73CWE-88Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-88.

Summary

A vulnerability in the web UI of Cisco Modeling Labs could allow an authenticated, remote attacker to execute arbitrary commands with the privileges of the web application on the underlying operating system of an affected Cisco Modeling Labs server. This vulnerability is due to insufficient validation of user-supplied input to the web UI. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected server. A successful exploit could allow the attacker to execute arbitrary commands with the privileges of the web application, virl2, on the underlying operating system of the affected server. To exploit this vulnerability, the attacker must have valid user credentials on the web UI.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.30492 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Modeling Labsall versions—No fix listedCNA
  • Cisco Modeling Labs VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:cisco:modeling_labs:2.0.0:*:*:*:*:*:*:*2.0.0VulnerableCisco
cpe:2.3:a:cisco:modeling_labs:2.0.1:*:*:*:*:*:*:*2.0.1VulnerableCisco
cpe:2.3:a:cisco:modeling_labs:2.1.0:*:*:*:*:*:*:*2.1.0VulnerableCisco
cpe:2.3:a:cisco:modeling_labs:2.1.1:*:*:*:*:*:*:*2.1.1VulnerableCisco
cpe:2.3:a:cisco:modeling_labs:2.1.2:*:*:*:*:*:*:*2.1.2VulnerableCisco
cpe:2.3:a:cisco:modeling_labs:2.1.3:*:*:*:*:*:*:*2.1.3VulnerableCisco
  • cpe:2.3:a:cisco:modeling_labs:2.0.0:*:*:*:*:*:*:* Versions 2.0.0 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:modeling_labs:2.0.1:*:*:*:*:*:*:* Versions 2.0.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:modeling_labs:2.1.0:*:*:*:*:*:*:* Versions 2.1.0 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:modeling_labs:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:modeling_labs:2.1.2:*:*:*:*:*:*:* Versions 2.1.2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:modeling_labs:2.1.3:*:*:*:*:*:*:* Versions 2.1.3 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1531
  2. 2026-10-03 Alias added: GHSA-m74m-f2xh-459p

References

Exploit 1

Advisory 1

  • TI-2023-06861 Cisco Modeling Labs External Authentication Bypass Vulnerability CVSS 3.1CRITICAL 9.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences