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TI-2020-02701 Aliases CVE-2020-3139GHSA-j72w-hrcq-cmrg

Cisco Application Policy Infrastructure Controller Out Of Band Management IP Tables Bypass Vulnerability

Priority LOW 32CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A vulnerability in the out of band (OOB) management interface IP table rule programming for Cisco Application Policy Infrastructure Controller (APIC) could allow an unauthenticated, remote attacker to bypass configured deny entries for specific IP ports. These IP ports would be permitted to the OOB management interface when, in fact, the packets should be dropped. The vulnerability is due to the configuration of specific IP table entries for which there is a programming logic error that results in the IP port being permitted. An attacker could exploit this vulnerability by sending traffic to the OOB management interface on the targeted device. A successful exploit could allow the attacker to bypass configured IP table rules to drop specific IP port traffic. The attacker has no control over the configuration of the device itself. This vulnerability affects Cisco APIC releases prior to the first fixed software Release 4.2(3j).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01042 64th percentileScored 2026-11-07
Fix Fixed Cisco Application Policy Infrastructure Controller (APIC) (Cisco): 4.2(3j)

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

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 Application Policy Infrastructure Controller (APIC)before 4.2(3j)4.2(3j)Patch availableCNA
  • Cisco Application Policy Infrastructure Controller (APIC) VendorCisco Affected before 4.2(3j) Fixed in 4.2(3j) Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:application_policy_infrastructure_controller:*:*:*:*:*:*:*:*before 4.2\(3j\)VulnerableCisco
  • cpe:2.3:a:cisco:application_policy_infrastructure_controller:*:*:*:*:*:*:*:* Versions before 4.2\(3j\) Vulnerable ·Cisco

Remediation

  • Fix · CNA Cisco Application Policy Infrastructure Controller (APIC) (Cisco) Fixed in 4.2(3j)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3139
  2. 2026-10-03 Alias added: GHSA-j72w-hrcq-cmrg

References

Advisory 1

  • TI-2021-01115 Cisco ACI Multi-Site Orchestrator Application Services Engine Deployment Authentication Bypass Vulnerability CVSS 3.1CRITICAL 10.0
  • TI-2021-01120 Cisco Application Services Engine Unauthorized Access Vulnerabilities CVSS 3.1CRITICAL 9.8
  • TI-2021-01123 Cisco Application Services Engine Unauthorized Access Vulnerabilities CVSS 3.1CRITICAL 9.8
  • TI-2021-01301 Cisco Application Policy Infrastructure Controller Arbitrary File Read and Write Vulnerability CVSS 3.1CRITICAL 9.1
  • TI-2021-01305 Cisco Application Policy Infrastructure Controller Command Injection and File Upload Vulnerabilities CVSS 3.1CRITICAL 9.1
  • TI-2021-01302 Cisco Application Policy Infrastructure Controller Privilege Escalation Vulnerability CVSS 3.1HIGH 8.8
See all 33 →

Sources

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