CVE-2018-0252

highpriority · track · 35EPSS 0.024 · 84 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.35% (84th) EPSS

CVSS 7.8 · high

Is it mine?

8 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisco_csaf · nvd

EPSS · scored 2026-10-27

A vulnerability in the IP Version 4 (IPv4) fragment reassembly function of Cisco 3500, 5500, and 8500 Series Wireless LAN Controller Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to a corruption of an internal data structure process that occurs when the affected software reassembles certain IPv4 packets. An attacker could exploit this vulnerability by sending certain malformed IPv4 fragments to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability affects all releases of 8.4 until the first fixed release for the 5500 and 8500 Series Wireless LAN Controllers and releases 8.5.103.0 and 8.5.105.0 for the 3500, 5500, and 8500 Series Wireless LAN Controllers. Cisco Bug IDs: CSCvf89222.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixed8.4.100.0cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed8.5.103.0cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed8.5.105.0cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technical severity, 0–10. One row per scoring source.

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 4

v3.07.9highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimaryCWE-399US

affected products (8)

Products and version ranges known to be affected.

Cisco 8.4.100.0all versionscisco_csafUS
Cisco 8.5.103.0all versionscisco_csafUS
Cisco 8.5.105.0all versionscisco_csafUS
n/a Cisco Wireless LAN Controller≤ Cisco Wireless LAN Controllerenisa_euvdEU
cisco wireless lan controller software= 8.4(100.0)nvdUScpe:2.3:o:cisco:wireless_lan_controller_software:*:*:*:*:*:*:*:*
cisco wireless lan controller software= 8.5(107.30)nvdUScpe:2.3:o:cisco:wireless_lan_controller_software:*:*:*:*:*:*:*:*
cisco wireless lan controller software= 8.5(107.41)nvdUScpe:2.3:o:cisco:wireless_lan_controller_software:*:*:*:*:*:*:*:*
cisco wireless lan controller software= 8.6(1.108)nvdUScpe:2.3:o:cisco:wireless_lan_controller_software:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-20180502-wlc-ipCisco Wireless LAN Controller IP Fragment Reassembly Denial of Service Vulnerability2018-05-02csaf · cisco_csafUS
A vulnerability in the IP Version 4 (IPv4) fragment reassembly function of Cisco 3500, 5500, and 8500 Series Wireless LAN Controller Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to a corruption of an internal data structure process that occurs when the affected software reassembles certain IPv4 packets. An attacker could exploit this vulnerability by sending certain malformed IPv4 fragments to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-ip ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-ip"]

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisco_csaf nvd NVD CVE.org MITRE

published 2018-05-02modified 2026-06-17

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+21039 more

references (6)

External citations — patches, advisories, analysis.

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