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TI-2019-01220 Aliases CVE-2019-1593GHSA-r3m8-6ph3-2x9x

Cisco NX-OS Software Bash Shell Role-Based Access Control Bypass Privilege Escalation Vulnerability

Priority LOW 36CWE-264Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-264.

Summary

A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to escalate their privilege level by executing commands authorized to other user roles. The attacker must authenticate with valid user credentials. The vulnerability is due to the incorrect implementation of a Bash shell command that allows role-based access control (RBAC) to be bypassed. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Bash prompt. A successful exploit could allow the attacker to escalate their privilege level by executing commands that should be restricted to other roles. For example, a dev-ops user could escalate their privilege level to admin with a successful exploit of this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00386 32nd percentileScored 2026-11-07
Fix Fixed Nexus 3000 Series Switches (Cisco): 7.0(3)I7(4)Nexus 3500 Platform Switches (Cisco): 7.0(3)I7(4)+4 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
CiscoNexus 3000 Series Switchesbefore 7.0(3)I7(4)7.0(3)I7(4)Patch availableCNA
CiscoNexus 3500 Platform Switchesbefore 7.0(3)I7(4)7.0(3)I7(4)Patch availableCNA
CiscoNexus 3600 Platform Switchesbefore 7.0(3)F3(5)7.0(3)F3(5)Patch availableCNA
CiscoNexus 7000 and 7700 Series Switchesbefore 8.2(3)8.2(3)Patch availableCNA
CiscoNexus 9000 Series Fabric Switches in ACI Modebefore 13.2(4d); before 14.0(1h)13.2(4d), 14.0(1h)Patch availableCNA
CiscoNexus 9000 Series Switches in Standalone NX-OS Modebefore 7.0(3)I4(9); before 7.0(3)I7(4)7.0(3)I4(9), 7.0(3)I7(4)Patch availableCNA
  • Nexus 3000 Series Switches VendorCisco Affected before 7.0(3)I7(4) Fixed in 7.0(3)I7(4) Patch available CNA
  • Nexus 3500 Platform Switches VendorCisco Affected before 7.0(3)I7(4) Fixed in 7.0(3)I7(4) Patch available CNA
  • Nexus 3600 Platform Switches VendorCisco Affected before 7.0(3)F3(5) Fixed in 7.0(3)F3(5) Patch available CNA
  • Nexus 7000 and 7700 Series Switches VendorCisco Affected before 8.2(3) Fixed in 8.2(3) Patch available CNA
  • Nexus 9000 Series Fabric Switches in ACI Mode VendorCisco Affected before 13.2(4d); before 14.0(1h) Fixed in 13.2(4d), 14.0(1h) Patch available CNA
  • Nexus 9000 Series Switches in Standalone NX-OS Mode VendorCisco Affected before 7.0(3)I4(9); before 7.0(3)I7(4) Fixed in 7.0(3)I4(9), 7.0(3)I7(4) Patch available CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*7.0\(3\)i5 to before 7.0\(3\)i7\(4\)VulnerableCisco
cpe:2.3:h:cisco:nexus_3000:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*7.0\(3\)i4 to before 7.0\(3\)i4\(9\); 7.0\(3\) to before 7.0\(3\)i7\(4\)VulnerableCisco
cpe:2.3:h:cisco:nexus_3500:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*7.0\(3\) to before 7.0\(3\)f3\(5\)VulnerableCisco
cpe:2.3:h:cisco:nexus_3600:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*8.1 to before 8.2\(3\); 8.3 to before 8.3\(1\)VulnerableCisco
cpe:2.3:h:cisco:nexus_7000:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:nexus_7700:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*before 13.2\(4d\); 14.0 to before 14.0\(1h\)VulnerableCisco
  • cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* Versions 7.0\(3\)i5 to before 7.0\(3\)i7\(4\) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:nexus_3000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* Versions 7.0\(3\)i4 to before 7.0\(3\)i4\(9\); 7.0\(3\) to before 7.0\(3\)i7\(4\) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:nexus_3500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* Versions 7.0\(3\) to before 7.0\(3\)f3\(5\) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:nexus_3600:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* Versions 8.1 to before 8.2\(3\); 8.3 to before 8.3\(1\) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:nexus_7000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:nexus_7700:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* Versions before 13.2\(4d\); 14.0 to before 14.0\(1h\) Vulnerable ·Cisco
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:h:cisco:nexus_9000_in_aci_mode:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:nexus_9000_in_standalone:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:nexus_9500:*:*:*:*:*:*:*:*all versionsRunning onCisco
  • cpe:2.3:h:cisco:nexus_9000_in_aci_mode:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:nexus_9000_in_standalone:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:nexus_9500:*:*:*:*:*:*:*:* Versions all versions Running on ·Cisco

Remediation

  • Fix · CNA Nexus 3000 Series Switches (Cisco) Fixed in 7.0(3)I7(4)
  • Fix · CNA Nexus 3500 Platform Switches (Cisco) Fixed in 7.0(3)I7(4)
  • Fix · CNA Nexus 3600 Platform Switches (Cisco) Fixed in 7.0(3)F3(5)
  • Fix · CNA Nexus 7000 and 7700 Series Switches (Cisco) Fixed in 8.2(3)
  • Fix · CNA Nexus 9000 Series Fabric Switches in ACI Mode (Cisco) Fixed in 13.2(4d), 14.0(1h)
  • Fix · CNA Nexus 9000 Series Switches in Standalone NX-OS Mode (Cisco) Fixed in 7.0(3)I4(9), 7.0(3)I7(4)

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Cisco Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 7000 and 7700 Series Switches 7.0(3)I7(4), 8.2(3)

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2019-01221 Cisco NX-OS Software 802.1X Extensible Authentication Protocol over LAN Denial of Service VulnerabilityPriority LOW 34
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-1593
  2. 2026-10-03 Alias added: GHSA-r3m8-6ph3-2x9x

References

Patch 1

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2024-13332 Cisco NX-OS Software CLI Command Injection Vulnerability KEVCVSS 3.1MEDIUM 6.7
  • TI-2018-00260 Improper input validation in Cisco NX-OS unknown CVSS 3.0CRITICAL 9.8
  • TI-2019-01226 Cisco NX-OS Software Netstack Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2022-05183 Cisco NX-OS Software Cisco Fabric Services Over IP Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2022-05182 Cisco Nexus 9000 Series Switches Bidirectional Forwarding Detection Denial of Service Vulnerability CVSS 3.1HIGH 8.6
See all 274 →

Sources

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