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TI-2021-13768 Aliases CVE-2021-34770GHSA-6cpp-45v5-cpgv

Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability

Priority MEDIUM 54CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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 · CNA. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to execute arbitrary code with administrative privileges or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a logic error that occurs during the validation of CAPWAP packets. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to an affected device. A successful exploit could allow the attacker to execute arbitrary code with administrative privileges or cause the affected device to crash and reload, resulting in a DoS condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02964 87th 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
Yes
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 · 39

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe:-:*:*:*:*:*:*:*not specified by NVDVulnerableCisco
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:16.6.4s:*:*:*:*:*:*:*16.6.4sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:*16.10.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.10.1e:*:*:*:*:*:*:*16.10.1eVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.10.1s:*:*:*:*:*:*:*16.10.1sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*16.11.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:*16.11.1aVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:*16.11.1bVulnerableCisco
  • cpe:2.3:o:cisco:ios_xe:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
  • 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:16.6.4s:*:*:*:*:*:*:* Versions 16.6.4s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:* Versions 16.10.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.10.1e:*:*:*:*:*:*:* Versions 16.10.1e Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.10.1s:*:*:*:*:*:*:* Versions 16.10.1s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:* Versions 16.11.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:* Versions 16.11.1a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:* Versions 16.11.1b Vulnerable ·Cisco
Show 29 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:*16.11.1cVulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:*16.11.2VulnerableCisco
cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*16.12.1VulnerableCisco
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:16.12.2s:*:*:*:*:*:*:*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:16.12.3s:*:*:*:*:*:*:*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:17.1.1:*:*:*:*:*:*:*17.1.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:*17.1.1sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:*17.1.1tVulnerableCisco
cpe:2.3:o:cisco:ios_xe:17.1.2:*:*:*:*:*:*:*17.1.2VulnerableCisco
cpe:2.3:o:cisco:ios_xe:17.1.3:*:*:*:*:*:*:*17.1.3VulnerableCisco
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:17.3.1:*:*:*:*:*:*:*17.3.1VulnerableCisco
cpe:2.3:h:cisco:catalyst_9800:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:catalyst_9800-40:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:catalyst_9800-40_wireless_controller:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:catalyst_9800-80:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:catalyst_9800-80_wireless_controller:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:catalyst_9800-cl:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:catalyst_9800-l:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:catalyst_9800-l-c:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:catalyst_9800-l-f:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:catalyst_9800_embedded_wireless_controller:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:* Versions 16.11.1c Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:* Versions 16.11.2 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:16.12.1s:*:*:*:*:*:*:* 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:16.12.2s:*:*:*:*:*:*:* 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:16.12.3s:*:*:*:*:*:*:* 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:17.1.1:*:*:*:*:*:*:* Versions 17.1.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:* Versions 17.1.1s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:* Versions 17.1.1t Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:17.1.2:*:*:*:*:*:*:* Versions 17.1.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:17.1.3:*:*:*:*:*:*:* Versions 17.1.3 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:17.3.1:*:*:*:*:*:*:* Versions 17.3.1 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800-40:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800-40_wireless_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800-80:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800-80_wireless_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800-cl:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800-l:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800-l-c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800-l-f:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:catalyst_9800_embedded_wireless_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34770
  2. 2026-10-03 Alias added: GHSA-6cpp-45v5-cpgv

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