CVE-2024-20464Network attack vector

Device reload via insufficient IPv4 PIMv2 validation

Published Sep 25, 2024 · Updated Sep 25, 2024

Denial of service in Cisco IOS XE Software 17.13.1 and 17.13.1a allows remote attackers to reload devices with crafted IPv4 PIMv2 packets. The PIM feature insufficiently validates received IPv4 PIMv2 packets before processing them, allowing a malformed packet to trigger a device reload. No authentication is required, but PIM must be configured on the receiving interface; IPv6 PIM is unaffected, and either IPv4 unicast or multicast delivery reaches the flaw.

CVSS severity8.6
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Cisco IOS XE Software 17.13.1 and 17.13.1a allows remote attackers to reload devices with crafted IPv4 PIMv2 packets. The PIM feature insufficiently validates received IPv4 PIMv2 packets before processing them, allowing a malformed packet to trigger a device reload. No authentication is required, but PIM must be configured on the receiving interface; IPv6 PIM is unaffected, and either IPv4 unicast or multicast delivery reaches the flaw.

The record

CVE
CVE-2024-20464
Published
Sep 25, 2024
Updated
Sep 25, 2024
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=17.13.1
  2. Affected versionversion=17.13.1a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco IOS XE Softwareversion=17.13.1; version=17.13.1a

Published CVSS scores

8.6CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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