CVE-2023-20256
Quick assessment
Affected
Cisco Cisco 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.
Cisco Firepower Threat Defense（FTD）是美国思科（Cisco）公司的一套提供下一代防火墙服务的统一软件。 Cisco Adaptive Security Appliance 和 Cisco Firepower Threat Defense存在安全漏洞，该漏洞源于 per-user-override 功能中存在多个漏洞，可能允许未经身份验证的远程攻击者绕过配置的访问控制列表 (ACL)。
Possible ATT&CK Techniques 1 AI
T1562.006
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2023-20256
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Multiple vulnerabilities in the per-user-override feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured access control list (ACL) and allow traffic that should be denied to flow through an affected device. These vulnerabilities are due to a logic error that could occur when the affected software constructs and applies per-user-override rules. An attacker could exploit these vulnerabilities by connecting to a network through an affected device that has a vulnerable configuration. A successful exploit could allow the attacker to bypass the interface ACL and access resources that would should be protected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Firepower Threat Defense 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Firepower Threat Defense（FTD）是美国思科（Cisco）公司的一套提供下一代防火墙服务的统一软件。 Cisco Adaptive Security Appliance 和 Cisco Firepower Threat Defense存在安全漏洞，该漏洞源于 per-user-override 功能中存在多个漏洞，可能允许未经身份验证的远程攻击者绕过配置的访问控制列表 (ACL)。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco Adaptive Security Appliance (ASA) Software | 9.8.4.25 | - |
|
| Cisco | Cisco Firepower Threat Defense Software | 6.2.3.16 | - |
|
II. Public POCs for CVE-2023-20256
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2023-20256
请登录查看更多情报信息。
Vendor Advisories for CVE-2023-20256 (1)
Same Patch Batch · Cisco · 2023-11-01 · 32 CVEs total
| CVE-2023-20048 | 9.9 CRITICAL | Cisco Firepower Management Center 安全漏洞 |
| CVE-2023-20175 | 8.8 HIGH | Cisco Identity Services Engine 安全漏洞 |
| CVE-2023-20244 | 8.6 HIGH | Cisco Firepower Threat Defense 安全漏洞 |
| CVE-2023-20095 | 8.6 HIGH | Cisco Firepower Threat Defense 安全漏洞 |
| CVE-2023-20083 | 8.6 HIGH | Cisco Firepower Threat Defense 安全漏洞 |
| CVE-2023-20086 | 8.6 HIGH | Cisco Firepower Threat Defense和Cisco ASA 安全漏洞 |
| CVE-2023-20063 | 8.2 HIGH | Cisco Cisco Firepower Threat Defense Software and Cisco Firepower Management Center Code I |
| CVE-2023-20155 | 7.5 HIGH | Cisco Firepower Management Center 安全漏洞 |
| CVE-2023-20220 | 7.2 HIGH | Cisco Firepower Management Center 安全漏洞 |
| CVE-2023-20219 | 7.2 HIGH | Cisco Firepower Management Center 安全漏洞 |
| CVE-2023-20042 | 6.8 MEDIUM | Cisco Firepower Threat Defense 跨站脚本漏洞 |
| CVE-2023-20114 | 6.5 MEDIUM | Cisco Firepower Management Center 安全漏洞 |
| CVE-2023-20264 | 6.1 MEDIUM | Cisco Firepower Threat Defense 安全漏洞 |
| CVE-2023-20206 | 6.1 MEDIUM | Cisco Firepower Management Center 安全漏洞 |
| CVE-2023-20170 | 6.0 MEDIUM | Cisco Identity Services Engine 安全漏洞 |
| CVE-2023-20071 | 5.8 MEDIUM | Cisco Firepower Threat Defense 安全漏洞 |
| CVE-2023-20270 | 5.8 MEDIUM | Cisco Firepower Threat Defense 安全漏洞 |
| CVE-2023-20245 | 5.8 MEDIUM | Cisco Firepower Threat Defense 安全漏洞 |
| CVE-2023-20246 | 5.8 MEDIUM | Cisco Catalys 和 Integrated Services Virtual Router 安全漏洞 |
| CVE-2023-20255 | 5.3 MEDIUM | Cisco Meeting Server 安全漏洞 |
Showing top 20 of 32 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Cisco Adaptive Security Appliance (ASA) Software
-
CVE-2025-20254
Cisco Secure Firewall Adaptive Security Appliance和Cisco Secu -
CVE-2025-20263
Cisco Adaptive Security Appliance Software and Firepower Thr -
CVE-2025-20253
Cisco IOS, IOS XE, Secure Firewall Adaptive Security Applian -
CVE-2025-20252
Cisco Secure Firewall Management Center和Cisco Secure Firewal -
CVE-2025-20251
Cisco Secure Firewall Adaptive Security Appliance and Cisco
Same vendor: Cisco
-
CVE-2026-76504
Cisco Catalyst SD-WAN Manager System Account Authorization B -
CVE-2026-76426
Cisco ISE REST API SQL Injection Vulnerability -
CVE-2026-20121
CIsco FTD Bypass Access List -
CVE-2026-76431
Cisco Identity Services Engine Arbitrary File Deletion Vulne -
CVE-2026-76427
Cisco ISE XML External Entity Injection Vulnerability
Same weakness: CWE-290
-
CVE-2026-103397
OpenSave before 2.4.0-beta.1 Authentication Bypass via Spoof -
CVE-2026-97274
WordPress OAuth Single Sign On – SSO (OAuth Client) plugin < -
CVE-2026-97249
WordPress Paid Member Subscriptions plugin <= 3.0.9 - Bypass -
CVE-2026-96825
WordPress All In One WP Security & Firewall plugin <= 5.4.8 -
CVE-2026-101280
Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_
V. Comments for CVE-2023-20256
No comments yet