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CVE-2024-20271

HIGH
8.6
CVSS Score
Published: March 27, 2024 at 05:05 PM UTC
Updated: June 17, 2026 at 07:06 AM UTC
15 products affected across 1 vendorIOS XeWireless LAN Controller SoftwareAironet Access Point

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Severity
HIGH8.6
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

A vulnerability in the IP packet processing of Cisco Access Point (AP) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of certain IPv4 packets. An attacker could exploit this vulnerability by sending a crafted IPv4 packet either to or through an affected device. A successful exploit could allow the attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To successfully exploit this vulnerability, the attacker does not need to be associated with the affected AP. This vulnerability cannot be exploited by sending IPv6 packets.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Aironet Access Point· Cisco
95%
16.10.116.10.1e16.11.116.11.1a16.11.1b16.11.1c16.12.116.12.1s16.12.1t16.12.2s16.12.316.12.416.12.4a16.12.516.12.616.12.6a16.12.716.12.817.1.117.1.1s17.1.1t17.10.117.11.117.12.117.2.117.2.1a17.2.217.2.317.3.117.3.217.3.2a17.3.317.3.417.3.4c17.3.517.3.5a17.3.5b17.3.617.4.117.4.217.5.117.6.117.6.217.6.317.6.417.6.517.7.117.8.117.9.117.9.217.9.317.9.417.9.4a8.10.105.08.10.111.08.10.112.08.10.113.08.10.121.08.10.122.08.10.130.08.10.141.08.10.142.08.10.150.08.10.151.08.10.161.08.10.162.08.10.170.08.10.171.08.10.181.08.10.182.08.10.183.08.10.185.08.2(100.0)8.2(130.0)8.2.100.08.2.110.08.2.111.08.2.121.08.2.130.08.2.141.08.2.151.08.2.160.08.2.161.08.2.163.08.2.164.08.2.166.08.2.170.08.3.102.08.3.104.148.3.104.378.3.104.468.3.104.648.3.108.08.3.111.08.3.112.08.3.121.08.3.122.08.3.130.08.3.131.08.3.132.08.3.133.08.3.135.08.3.140.08.3.141.08.3.143.08.3.15.1178.3.15.1188.3.15.1208.3.15.1428.3.15.1588.3.15.1658.3.15.1698.3.15.258.3.150.08.3.200.2008.3.90.118.3.90.258.3.90.368.3.90.538.3.90.588.4.1.1428.4.1.1758.4.1.1998.4.1.2188.4.1.918.4.1.928.4.100.08.5.100.08.5.101.08.5.102.08.5.103.08.5.105.08.5.110.08.5.120.08.5.131.08.5.135.08.5.140.08.5.151.08.5.160.08.5.161.08.5.164.08.5.171.08.5.182.08.5.182.11 ME8.6.1.708.6.1.718.6.1.848.6.101.08.7.1.168.7.102.08.7.106.08.8.100.08.8.111.08.8.120.08.8.125.08.8.130.08.9.100.08.9.111.0
Business Wireless Access Point· Cisco
95%
v < 10.6.2.0v < 10.9.1.01.0.0.101.0.0.121.0.0.131.0.0.141.0.0.151.0.0.161.0.0.171.0.0.31.0.0.391.0.0.41.0.0.51.0.0.71.0.0.91.0.1.101.0.1.111.0.1.121.0.1.21.0.1.31.0.1.41.0.1.51.0.1.61.0.1.71.0.1.91.0.2.01.0.2.131.0.2.141.0.2.151.0.2.161.0.2.171.0.2.21.0.2.31.0.2.61.0.2.81.0.3.11.0.3.41.0.4.21.0.4.31.0.4.41.0.5.01.0.5.31.0.6.21.0.6.51.0.6.61.0.6.71.0.6.81.1.0.31.1.0.41.1.0.51.1.0.61.1.0.71.1.0.91.1.1.01.1.2.31.1.2.41.1.3.21.1.4.01.1.4.61.2.0.21.2.0.31.2.1.31.3.0.31.3.0.41.3.0.61.3.0.710.0.1.010.0.2.010.1.1.010.1.2.010.2.1.010.2.2.010.3.1.010.3.1.110.3.2.010.4.1.010.4.2.010.5.2.010.6.1.010.7.1.010.8.1.0
Affected range stops below 10.6.2.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.9.1.0, so it looks safe — our inference, not a vendor statement
cisco-business-140ac (environment) · cisco-business-140ac-access-point (environment) · cisco-business-141acm (environment) · cisco-business-142acm (environment) · cisco-business-143acm (environment) · cisco-business-145ac (environment) · cisco-business-145ac-access-point (environment) · cisco-business-150ax (environment) · cisco-business-150ax-access-point (environment) · cisco-business-151axm (environment) · cisco-business-240ac (environment)
IOS Xe· Cisco
95%
v < 17.3.817.10 ≤ v < 17.12.217.4 ≤ v < 17.6.617.7 ≤ v < 17.9.5
Affected range stops below 17.12.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.3.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.6.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.9.5, so it looks safe — our inference, not a vendor statement
Wireless LAN Controller Software· Cisco
95%
v < 8.10.190.0
Affected range stops below 8.10.190.0, so it looks safe — our inference, not a vendor statement
Business 140Ac· Ciscodevice
80%
All versions
Business 140Ac Access Point· Ciscodevice
80%
All versions
Business 141Acm· Ciscodevice
80%
All versions
Business 142Acm· Ciscodevice
80%
All versions
Business 143Acm· Ciscodevice
80%
All versions
Business 145Ac· Ciscodevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-dos-h9TGGX6W

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.6HIGHcisco
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-20NVD-CWE-Other

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