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TI-2021-01159 Aliases CVE-2021-1432GHSA-gcqm-xc9c-9vw6

Cisco IOS XE SD-WAN Software Arbitrary Command Execution Vulnerability

Priority LOW 34CWE-20Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

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

Summary

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system as the root user. The attacker must be authenticated on the affected device as a low-privileged user to exploit this vulnerability. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by injecting arbitrary commands to a file as a lower-privileged user. The commands are then executed on the device by the root user. A successful exploit could allow the attacker to execute arbitrary commands as the root user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00353 29th 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 · 26

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:*3.15.1xbsVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*3.15.2xbsVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*16.12.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1a:*:*:*:*:*:*:*16.12.1aVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:*16.12.1cVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:*16.12.1sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:*16.12.1tVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1w:*:*:*:*:*:*:*16.12.1wVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1x:*:*:*:*:*:*:*16.12.1xVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1y:*:*:*:*:*:*:*16.12.1yVulnerableCisco
  • cpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:* Versions 3.15.1xbs Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:* Versions 3.15.2xbs Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:* Versions 16.12.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1a:*:*:*:*:*:*:* Versions 16.12.1a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:* Versions 16.12.1c Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:* Versions 16.12.1s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:* Versions 16.12.1t Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1w:*:*:*:*:*:*:* Versions 16.12.1w Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1x:*:*:*:*:*:*:* Versions 16.12.1x Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1y:*:*:*:*:*:*:* Versions 16.12.1y Vulnerable ·Cisco
Show 16 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe:16.12.1z:*:*:*:*:*:*:*16.12.1zVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1za:*:*:*:*:*:*:*16.12.1zaVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:*16.12.2VulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.2a:*:*:*:*:*:*:*16.12.2aVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:*16.12.2sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:*16.12.2tVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:*16.12.3VulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.3a:*:*:*:*:*:*:*16.12.3aVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.3s:*:*:*:*:*:*:*16.12.3sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.4:*:*:*:*:*:*:*16.12.4VulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.4a:*:*:*:*:*:*:*16.12.4aVulnerableCisco
cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:*17.2.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:*17.2.1aVulnerableCisco
cpe:2.3:o:cisco:ios_xe:17.2.1r:*:*:*:*:*:*:*17.2.1rVulnerableCisco
cpe:2.3:o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:*17.2.1vVulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:-:*:*:*:*:*:*:*not specified by NVDVulnerableCisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1z:*:*:*:*:*:*:* Versions 16.12.1z Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.1za:*:*:*:*:*:*:* Versions 16.12.1za Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:* Versions 16.12.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.2a:*:*:*:*:*:*:* Versions 16.12.2a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:* Versions 16.12.2s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:* Versions 16.12.2t Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:* Versions 16.12.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.3a:*:*:*:*:*:*:* Versions 16.12.3a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.3s:*:*:*:*:*:*:* Versions 16.12.3s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.4:*:*:*:*:*:*:* Versions 16.12.4 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.12.4a:*:*:*:*:*:*:* Versions 16.12.4a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:* Versions 17.2.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:* Versions 17.2.1a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:17.2.1r:*:*:*:*:*:*:* Versions 17.2.1r Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:* Versions 17.2.1v Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1432
  2. 2026-10-03 Alias added: GHSA-gcqm-xc9c-9vw6

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