CVE-2024-20467

highpriority · track · 44EPSS 0.010 · 62 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.98% (62nd) EPSS

CVSS 8.6 · high

Is it mine?

14 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A vulnerability in the implementation of the IPv4 fragmentation reassembly code in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper management of resources during fragment reassembly. An attacker could exploit this vulnerability by sending specific sizes of fragmented packets to an affected device or through a Virtual Fragmentation Reassembly (VFR)-enabled interface on an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: This vulnerability affects Cisco ASR 1000 Series Aggregation Services Routers and Cisco cBR-8 Converged Broadband Routers if they are running Cisco IOS XE Software Release 17.12.1 or 17.12.1a.

remediations

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

A vendor fix is available.

Fixed17.11.99SWcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed17.12.1cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed17.12.1acisco_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

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 4

v3.18.6highAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 3.9 · impact 4

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:Psecondary · CVSS-BT (t0sche)

v3.18.6highCVSS:3.1/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-399USCWE-399US

exploits (1)

Public proof-of-concept and weaponised exploit code.

saler-cve/PoC-Exploit-CVE-2024-20467saler-cve/PoC-Exploit-CVE-2024-20467PoC · poc_in_github

affected products (14)

Products and version ranges known to be affected.

Cisco IOS XEall versionscert_bundDEcpe:/o:cisco:ios_xe:-
Cisco 17.11.99SWall versionscisco_csafUS
Cisco 17.12.1all versionscisco_csafUS
Cisco 17.12.1aall versionscisco_csafUS
Cisco Cisco IOS XE Software≤ 17.12.1enisa_euvdEU
Cisco Cisco IOS XE Software≤ 17.12.1aenisa_euvdEU
Cisco Cisco IOS XE Software≤ 17.11.99SWenisa_euvdEU
Cisco Systems Inc. Cisco IOS XE≤ 17.12.1fstec_bduRU
Cisco Systems Inc. Cisco IOS XE≤ 17.12.1z2fstec_bduRU
Cisco Systems Inc. Cisco IOS XE≤ 17.12.1afstec_bduRU
Cisco Systems Inc. Cisco IOS XE≤ 17.11.99SWfstec_bduRU
cisco ios xe= 17.11.99swnvdUScpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
cisco ios xe= 17.12.1nvdUScpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
cisco ios xe= 17.12.1anvdUScpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-2221Cisco IOS XE: Mehrere SchwachstellenDeutsch2024-09-25csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Cisco IOS XE ausnutzen, um einen Denial of Service Angriff durchzuführen, die Zugriffskontrollliste (ACL) vor der Authentifizierung zu umgehen oder Daten zu manipulieren.
cisco-sa-cpp-vfr-dos-nhHKGgOCisco IOS XE Software IPv4 Fragmentation Reassembly Denial of Service Vulnerability2024-09-25csaf · cisco_csafUS
A vulnerability in the implementation of the IPv4 fragmentation reassembly code in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper management of resources during fragment reassembly. An attacker could exploit this vulnerability by sending specific sizes of fragmented packets to an affected device or through a Virtual Fragmentation Reassembly (VFR)-enabled interface on an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: This vulnerability affects Cisco ASR 1000 Series Aggregation Services Routers and Cisco cBR-8 Converged Broadband Routers if they are running Cisco IOS XE Software Release 17.12.1 or 17.12.1a. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is part of the September 2024 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2024 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75169"].

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund cisco_csaf nvd NVD CVE.org MITRE

published 2024-09-25modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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