CVE-2026-20193— Cisco Identity Services Engine Authentication Bypass Vulnerability
Possible ATT&CK Techniques 1AI
T1078 · Valid AccountsAffected Version Matrix 21
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Cisco | Cisco Identity Services Engine Software | 3.3.0 | affected |
3.3 Patch 2 | affected | ||
3.3 Patch 1 | affected | ||
3.3 Patch 3 | affected | ||
3.4.0 | affected | ||
3.3 Patch 4 | affected | ||
3.4 Patch 1 | affected | ||
3.3 Patch 5 | affected | ||
| … +13 more rows | |||
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I. Basic Information for CVE-2026-20193
Vulnerability Information
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Vulnerability Title
Cisco Identity Services Engine Authentication Bypass Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an authenticated, remote attacker with read-only Administrator privileges to gain unauthorized access to sensitive information on an affected device. This vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized read access to sensitive RADIUS Policy details that are restricted for their role.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco ISE 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco ISE是美国思科（Cisco）公司的一个 NAC 解决方案。用于管理零信任架构中的端点、用户和设备对网络资源的访问。 Cisco ISE存在安全漏洞，该漏洞源于RADIUS Policy API端点上基于角色的访问控制权限不当，可能导致具有只读管理员权限的经过身份验证的远程攻击者绕过Web管理界面直接调用受影响端点，获取未授权的敏感信息访问。
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 Identity Services Engine Software | 3.3.0 | - |
II. Public POCs for CVE-2026-20193
| # | POC Description | Source Link | Shenlong Link |
|---|
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Advisory · 1
Same Patch Batch · Cisco · 2026-05-06 · 12 CVEs total
| CVE-2026-20034 | 8.8 HIGH | Cisco Unity Connection Remote Code Execution Vulnerability |
| CVE-2026-20185 | 7.7 HIGH | Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability |
| CVE-2026-20167 | 7.7 HIGH | Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability |
| CVE-2026-20035 | 7.2 HIGH | Cisco Unity Connection Server-Side Request Forgery Vulnerability |
| CVE-2026-20168 | 6.5 MEDIUM | Cisco IoT Field Network Director Path Traversal Vulnerability |
| CVE-2026-20169 | 6.4 MEDIUM | Cisco IoT Field Network Director Command Injection Vulnerability |
| CVE-2026-20219 | 5.4 MEDIUM | Cisco Slido 安全漏洞 |
| CVE-2026-20195 | 5.3 MEDIUM | Cisco Identity Services Engine Observable Response Discrepancy Vulnerability |
| CVE-2026-20189 | 4.3 MEDIUM | Cisco Prime Infrastructure Information Disclosure Vulnerability |
| CVE-2026-20172 | 4.3 MEDIUM | Cisco Enterprise Chat and Email Lite Agent File Upload Vulnerability |
| CVE-2026-20188 | Cisco Crosswork Network Controller and Cisco Network Services Orchestrator Advisory |
IV. Related Vulnerabilities
Same product: Cisco Identity Services Engine Software
- CVE-2026-20195
Cisco Identity Services Engine Observable Response Discrepan - CVE-2026-20136
Cisco Identity Services Engine Authenticated Privilege Escal - CVE-2026-20180
Cisco Identity Services Engine Multiple Remote Code Executio - CVE-2026-20186
Cisco Identity Services Engine Multiple Authenticated Remote - CVE-2026-20148
Cisco Identity Services Engine Path Traversal Vulnerability
Same vendor: Cisco
- CVE-2026-20224
Cisco Catalyst SD-WAN Manager XML External Entity Injection - CVE-2026-20210
Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerabi - CVE-2026-20209
Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerabi - CVE-2026-20182
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulne - CVE-2026-20219
Cisco Slido 安全漏洞
Same weakness: CWE-862
- CVE-2026-33514
Discourse: Information Disclosure in Form Template API Due t - CVE-2026-32312
GLPI: Unauthorized export of form structure - CVE-2026-30950
AutoGPT has Authenticated Session Hijacking via IDOR - CVE-2026-45244
Summarize < 0.15.1 Unapproved Browser Automation Execution - CVE-2026-45242
Summarize < 0.15.1 Path Traversal via slidesDir Parameter
V. Comments for CVE-2026-20193
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