CVE-2024-20293Network attack vector

Unauthenticated ACL bypass via failed rule activation

Published May 22, 2024 · Updated Aug 1, 2024

ACL enforcement bypass in Cisco ASA and FTD Software allows remote attackers to reach trusted networks by sending traffic denied by an ACL. With object-group search enabled, activating a qualifying ACL silently leaves its rule inactive instead of applying the configuration change. Exposure requires a network-object group without a network-service object group and an inactive-to-active transition; IPv4 and IPv6 rules are affected.

CVSS severity5.8
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ACL enforcement bypass in Cisco ASA and FTD Software allows remote attackers to reach trusted networks by sending traffic denied by an ACL. With object-group search enabled, activating a qualifying ACL silently leaves its rule inactive instead of applying the configuration change. Exposure requires a network-object group without a network-service object group and an inactive-to-active transition; IPv4 and IPv6 rules are affected.

The record

CVE
CVE-2024-20293
Published
May 22, 2024
Updated
Aug 1, 2024
Vendor
ClamAV
Product
Cisco Adaptive Security Appliance (ASA) Software
Classifications
CWE-436, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=9.19.1
  2. Affected versionversion=9.19.1.12
  3. Affected versionversion=9.19.1.18
  4. Affected versionversion=9.19.1.22
  5. Affected versionversion=9.19.1.24
  6. Affected versionversion=9.19.1.5
  7. Affected versionversion=9.19.1.9
  8. Affected versionversion=9.20.1
  9. Affected versionversion=9.20.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Adaptive Security Appliance (ASA) Softwareversion=9.19.1; version=9.19.1.12; version=9.19.1.18; version=9.19.1.22; version=9.19.1.24; version=9.19.1.5; version=9.19.1.9; version=9.20.1; version=9.20.1.5
ClamAV · Cisco Firepower Management Centerversion=7.3.0; version=7.3.1; version=7.3.1.1; version=7.3.1.2
ClamAV · Cisco Firepower Threat Defenseversion=7.3.0; version=7.3.1; version=7.3.1.1; version=7.3.1.2; version=7.4.0

Published CVSS scores

5.8Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-436Interpretation Conflict
T1190Exploit Public-Facing Application

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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