Which products and versions are affected by CVE-2024-20359?

Affected: Firepower Threat Defense (Cisco) versions 6.2.3, 6.2.3.1, 6.2.3.10, 6.2.3.11, 6.2.3.12, 6.2.3.13, 6.2.3.14, 6.2.3.15; Secure Firewall Threat Defense (Cisco) versions 6.2.3, 6.2.3.1, 6.2.3.10, 6.2.3.11, 6.2.3.12, 6.2.3.13, 6.2.3.14, 6.2.3.15; Adaptive Security Appliance Software (Cisco) versions 9.12.1, 9.12.1.2, 9.12.1.3, 9.12.2, 9.12.2.1, 9.12.2.4, 9.12.2.5, 9.12.2.9, among others. The full list is in the CVE brief.

Is CVE-2024-20359 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 24, 2024 and is known to be used in ransomware campaigns.

Is CVE-2024-20359 in the CISA KEV catalog?

Yes. It was added on Apr 24, 2024 with a federal remediation due date of May 1, 2024.

Is there a public exploit for CVE-2024-20359?

Public exploit code is available.

Is there a fix for CVE-2024-20359?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2024-20359 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2024-20359

MediumExploitedPublic exploit

Published Apr 25, 2024 · Updated Aug 11, 2026

Key Facts

Patch immediately

CVE-2024-20359 is a medium-severity vulnerability (CVSS 6.0 v3.1) affecting Firepower Threat Defense (Cisco), Secure Firewall Threat Defense (Cisco), Adaptive Security Appliance Software (Cisco) and 2 more products.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 24, 2024 and is known to be used in ransomware campaigns. Public exploit code is available.
EPSS estimates a 19% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

6.0

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

EPSS (30-day exploit likelihood)

19%

Higher than 97.3% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings, used by ransomware

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2024-20359 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary code with root-level privileges. Administrator-level privileges are required to exploit this vulnerability. This vulnerability is due to improper validation of a file when it is read from system flash memory. An attacker could exploit this vulnerability by copying a crafted file to the disk0: file system of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the affected device after the next reload of the device, which could alter system behavior. Because the injected code could persist across device reboots, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Apr 24, 2024	May 1, 2024	Not reported
Industry KEV feed	Apr 24, 2024	May 1, 2024	Known
CIRCL KEV	Apr 24, 2024	May 1, 2024	Not reported
ENISA EUVD	Apr 24, 2024	n/a	Not reported

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Products

349 affected entries in total

Product	Affected versions	Fixed in
Firepower Threat DefenseCisco	6.2.3, 6.2.3.1, 6.2.3.10, 6.2.3.11, 6.2.3.12, 6.2.3.13, 6.2.3.14, 6.2.3.15	n/a
Secure Firewall Threat DefenseCisco	6.2.3, 6.2.3.1, 6.2.3.10, 6.2.3.11, 6.2.3.12, 6.2.3.13, 6.2.3.14, 6.2.3.15	n/a
Adaptive Security Appliance SoftwareCisco	9.12.1, 9.12.1.2, 9.12.1.3, 9.12.2, 9.12.2.1, 9.12.2.4, 9.12.2.5, 9.12.2.9	n/a
Cisco Adaptive Security Appliance (ASA) Software	>= 9.8.1	n/a
Cisco Firepower Threat Defense Software	>= 6.2.3	n/a

Timeline

Added to CISA KEV
Apr 24, 2024
Added to Industry KEV feed
Apr 24, 2024
Added to CIRCL KEV
Apr 24, 2024
Added to ENISA EUVD
Apr 24, 2024
Publicly disclosed
Apr 25, 2024
Last updated
Aug 11, 2026

Weakness Type

CWE-94 Improper Control of Generation of Code ('Code Injection')

References

11 more references in the full CVE brief

FAQ

Common Questions.

A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary code with root-level pri…
Affected: Firepower Threat Defense (Cisco) versions 6.2.3, 6.2.3.1, 6.2.3.10, 6.2.3.11, 6.2.3.12, 6.2.3.13, 6.2.3.14, 6.2.3.15; Secure Firewall Threat Defense (Cisco) versions 6.2.3, 6.2.3.1, 6.2.3.10, 6.2.3.11, 6.2.3.12, 6.2.3.13, 6.2.3.14, 6.2.3.15; Adaptive Security Appliance Software (Cisco) versions 9.12.1, 9.12.1.2, 9.12.1.3, 9.12.2, 9.12.2.1, 9.12.2.4, 9.12.2.5, 9.12.2.9, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 24, 2024 and is known to be used in ransomware campaigns.
Yes. It was added on Apr 24, 2024 with a federal remediation due date of May 1, 2024.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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