TI-2021-01111 Aliases CVE-2021-1384 GHSA-x749-h24f-x5rh

Cisco IOx for IOS XE Software Command Injection Vulnerability

HIGH 67CWE-77Published 2021-03-24 · Updated 2024-11-08

Key facts

Attack vector: Network
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 Cisco IOx application hosting environment of Cisco IOS XE Software could allow an authenticated, remote attacker to inject commands into the underlying operating system as the root user. This vulnerability is due to incomplete validation of fields in the application packages loaded onto IOx. An attacker could exploit this vulnerability by creating a crafted application .tar file and loading it onto the device. A successful exploit could allow the attacker to perform command injection into the underlying operating system as the root user.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.3539 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

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco IOS XE Software	all versions	—	No fix listed	CNA

Cisco IOS XE Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios_xe::::::::	before 16.6.9; 16.9.0 to before 16.9.7; 17.3.2 to before 17.3.3; 17.4.0 to before 17.4.2	Vulnerable	Cisco
cpe:2.3:o:cisco:ios_xe:17.5.0:::::::*	17.5.0	Vulnerable	Cisco

cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* Versions before 16.6.9; 16.9.0 to before 16.9.7; 17.3.2 to before 17.3.3; 17.4.0 to before 17.4.2 Vulnerable ·Cisco
cpe:2.3:o:cisco:ios_xe:17.5.0:*:*:*:*:*:*:* Versions 17.5.0 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-1384
2026-10-03 Alias added: GHSA-x749-h24f-x5rh

References

Exploit 1

https://github.com/orangecertcc/security-research/security/advisories/GHSA-h332-fj6p-2232

Advisory 1

20210324 Cisco IOx for IOS XE Software Command Injection Vulnerability

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