TI-2020-02865 Aliases CVE-2020-3308 GHSA-88c7-xpjh-3f4j

Cisco Firepower Threat Defense Software Signature Verification Bypass Vulnerability

LOW 23CWE-347Published 2020-05-06 · Updated 2024-11-15

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-347.

Summary

A vulnerability in the Image Signature Verification feature of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker with administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00607 49th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Firepower Threat Defense Software	all versions	—	No fix listed	CNA

Cisco Firepower Threat Defense Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::	before 6.2.2.1	Vulnerable	Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.2:::::::*	6.2.2	Vulnerable	Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3:::::::*	6.2.3	Vulnerable	Cisco

cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* Versions before 6.2.2.1 Vulnerable ·Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.2:*:*:*:*:*:*:* Versions 6.2.2 Vulnerable ·Cisco
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3:*:*:*:*:*:*:* Versions 6.2.3 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-3308
2026-10-03 Alias added: GHSA-88c7-xpjh-3f4j

References

Advisory 1

20200506 Cisco Firepower Threat Defense Software Signature Verification Bypass Vulnerability

TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16292 Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16502 Cisco Secure Firewall Management Center Software Static Credential Vulnerability KEVCVSS 3.1MEDIUM 5.3
TI-2016-05515 The Threat Management Console in Cisco Firepower Management Center 5.2.0 through 6.0.1… CVSS 3.1HIGH 8.8
TI-2025-14563 Cisco Secure Firewall Management Center Software Radius Remote Code Execution Vulnerability CVSS 3.1CRITICAL 10.0
TI-2023-06757 Improper privilege management in Cisco Firepower Management Center CVSS 3.1CRITICAL 9.9

See all 186 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences