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CVE-2026-20330— Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Improper Neutralization Vulnerabilities

Quick assessment

Affected

Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

作为思科对主动安全与产品质量持续承诺的一部分，思科 Secure Adaptive Security 设备软件、思科 Secure Firewall 威胁防御软件以及思科 Secure Firewall 管理中心软件的研发团队开展了一次全面的内部安全审查。此次审查导致发布了一个软件强化版本，该版本解决了多个内部发现的漏洞。由 CVE-2026-20330 跟踪的漏洞与不当中和（improper neutralization）问题相关，这些问题在常见弱点枚举（Common Weakness Enumeration,

CVSS 9.9 · Critical EPSS 0.46% · P40 Updated Sep 19, 2026

Possible ATT&CK Techniques 1 AI

T1595.002 · Vulnerability Scanning

Affected Version Matrix 230

Vendor	Product	Version Range	Status
Cisco	Cisco Secure Firewall Adaptive Security Appliance (ASA) Software	`9.16.1`	affected
		`9.16.1.28`	affected
		`9.16.2`	affected
		`9.16.2.3`	affected
		`9.16.2.7`	affected
		`9.16.2.11`	affected
		`9.16.2.13`	affected
		`9.16.2.14`	affected
… +113 more rows
Cisco	Cisco Secure Firewall Management Center (FMC)	`7.0.0`	affected
		`7.0.0.1`	affected
		`7.0.1`	affected
		`7.0.1.1`	affected
		`7.0.2`	affected
		`7.2.0`	affected
		`7.0.2.1`	affected
		`7.0.3`	affected
… +60 more rows
Cisco	Cisco Secure Firewall Threat Defense (FTD) Software	`7.0.0.1`	affected
		`7.0.1`	affected
		`7.0.1.1`	affected
		`7.0.2`	affected
		`7.0.2.1`	affected
		`7.0.3`	affected
		`7.0.4`	affected
		`7.0.5`	affected
… +33 more rows

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Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Improper Neutralization Vulnerabilities

Source: CVE Program / CVE List V5

Vulnerability Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense Software and Cisco Secure Firewall Management Center Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.   The vulnerabilities tracked by CVE-2026-20330 are related to improper neutralization issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-707.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

对消息或数据结构的处理不恰当

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE
Cisco	Cisco Secure Firewall Adaptive Security Appliance (ASA) Software	9.16.1	-
Cisco	Cisco Secure Firewall Management Center (FMC)	7.0.0	-
Cisco	Cisco Secure Firewall Threat Defense (FTD) Software	7.0.0.1	-

II. Public POCs for CVE-2026-20330

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-20330

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-20330 (1)

🔗 Cisco Secure Firewall Adaptive Security Appliance, Secure Firewall Threat Defense, and Secure Firewall Management Center Software Hardening Release: September 2026 Read full article

https://www.cve.org/CVERecord?id=CVE-2026-20330

Same Patch Batch · Cisco · 2026-09-16 · 79 CVEs total

CVE-2026-76460	10.0 CRITICAL	Cisco Identity Services Engine Authentication Bypass Vulnerability
CVE-2026-76423	10.0 CRITICAL	Cisco ISE API Authentication Bypass Vulnerability
CVE-2026-20130	10.0 CRITICAL	Cisco Identity Services Engine Hardening Release - Improper Neutralization Vulnerabilities
CVE-2026-20192	10.0 CRITICAL	Cisco Identity Services Engine Hardening Release - Access Control Vulnerabilities
CVE-2026-20332	9.9 CRITICAL	Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software
CVE-2026-20325	9.9 CRITICAL	Cisco Nexus Dashboard Software Security Hardening Release September 2026 - Improper Neutra
CVE-2026-20322	9.9 CRITICAL	Cisco Nexus Dashboard Software Security Hardening Release September 2026 - Improper Access
CVE-2026-20234	9.9 CRITICAL	Cisco Identity Services Engine Hardening Release - Insuffiencently Protected Credential Vu
CVE-2026-20329	9.9 CRITICAL	Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software
CVE-2026-20324	9.9 CRITICAL	Cisco Secure Firewall Management Center sftunnel Root Arbitrary Code Exectution Vulnerabil
CVE-2026-20307	9.9 CRITICAL	Cisco Identity Services Engine Remote Code Execution Vulnerability
CVE-2026-20242	9.8 CRITICAL	Cisco Secure Firewall Management Center Software Java Deserialization Remote Code Executio
CVE-2026-20326	9.8 CRITICAL	Cisco Nexus Dashboard Software Security Hardening Release September 2026 - Missing Authent
CVE-2026-20331	9.6 CRITICAL	Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software
CVE-2026-20306	9.1 CRITICAL	Cisco Identity Services Engine Command Injection Vulnerability
CVE-2026-20305	9.1 CRITICAL	Cisco Identity Services Engine Command Injection Vulnerability
CVE-2026-20284	9.1 CRITICAL	Cisco Identity Search Engine SXP REST API SQL Injection Vulnerability
CVE-2026-20176	9.1 CRITICAL	Cisco Identity Services Engine Remote Code Execution Vulnerability
CVE-2026-20341	9.1 CRITICAL	Cisco Secure Firewall Management Center Software sftunnel Deserialization Root Command Exe
CVE-2026-20194	9.1 CRITICAL	Cisco Identity Services Engine Hardening Release - Incorrect Resource Transfer Vulnerabili

Showing top 20 of 79 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Secure Firewall Adaptive Security Appliance (ASA) Software

Same vendor: Cisco

Same weakness: CWE-707