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TI-2018-00436 Aliases CVE-2018-0477GHSA-x627-jg77-frxc

Cisco IOS XE Software Command Injection Vulnerabilities

Priority LOW 32CWE-77Published · Updated

Key facts

Attack vector
Local
Privileges required
High
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 · NVD. Fix status from CNA. Impact type from CWE-77.

Summary

A vulnerability in the CLI parser of Cisco IOS XE Software could allow an authenticated, local attacker to execute commands on the underlying Linux shell of an affected device with root privileges. The vulnerability exist because the affected software improperly sanitizes command arguments, failing to prevent access to certain internal data structures on an affected device. An attacker who has privileged EXEC mode (privilege level 15) access to an affected device could exploit these vulnerabilities on the device by executing CLI commands that contain custom arguments. A successful exploit could allow the attacker to execute arbitrary commands with root privileges on the affected device.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00492 42nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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
CiscoCisco IOS XE Softwareall versions—No fix listedCNA
  • Cisco IOS XE Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe:15.3\(3\)s3.16:*:*:*:*:*:*:*15.3(3)s3.16VulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.7\(1\):*:*:*:*:*:*:*16.7(1)VulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:*16.7.1VulnerableCisco
  • cpe:2.3:o:cisco:ios_xe:15.3\(3\)s3.16:*:*:*:*:*:*:* Versions 15.3(3)s3.16 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.7\(1\):*:*:*:*:*:*:* Versions 16.7(1) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:* Versions 16.7.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

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

  • Advisory ·

    Cisco IOS XE Software — 20180926 Cisco IOS XE Software Command Injection Vulnerabilities

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2018-00438 Cisco IOS XE Software Command Injection VulnerabilitiesPriority LOW 32
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-0477
  2. 2026-10-03 Alias added: GHSA-x627-jg77-frxc

References

Advisory 1

  • TI-2023-06904 Cisco is providing an update for the ongoing investigation into observed exploitation of… KEVCVSS 3.1CRITICAL 10.0
  • TI-2018-00122 Memory corruption in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
  • TI-2017-04497 Memory corruption in Cisco IOS XE Software KEVCVSS 3.1HIGH 8.8
See all 561 →

Sources

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