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CVE-2026-20129— Cisco Catayst SD-WAN Authentication Bypass Vulnerability

Quick assessment

Affected
Cisco Cisco Catalyst SD-WAN Manager
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 Catalyst SD-WAN Manager（Cisco SD-WAN vManage）是美国思科（Cisco）公司的一个高度可定制的仪表板。可简化和自动化 Cisco SD-WAN 的部署、配置、管理和操作。 Cisco Catalyst SD-WAN Manager存在授权问题漏洞，该漏洞源于API身份验证不当，可能导致远程攻击者以netadmin角色权限执行命令。

CVSS 9.8 · Critical EPSS 0.74% · P53
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I. Basic Information for CVE-2026-20129

Vulnerability Information
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Vulnerability Title
Cisco Catayst SD-WAN Authentication Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the API user authentication of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain access to an affected system as a user who has the netadmin role. The vulnerability is due to improper authentication for requests that are sent to the API. An attacker could exploit this vulnerability by sending a crafted request to the API of an affected system. A successful exploit could allow the attacker to execute commands with the privileges of the netadmin role. Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability. 
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Catalyst SD-WAN Manager（Cisco SD-WAN vManage） 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Catalyst SD-WAN Manager（Cisco SD-WAN vManage）是美国思科（Cisco）公司的一个高度可定制的仪表板。可简化和自动化 Cisco SD-WAN 的部署、配置、管理和操作。 Cisco Catalyst SD-WAN Manager存在授权问题漏洞，该漏洞源于API身份验证不当，可能导致远程攻击者以netadmin角色权限执行命令。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Catalyst SD-WAN Manager 20.1.12 -

II. Public POCs for CVE-2026-20129

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III. Intelligence Information for CVE-2026-20129

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Same Patch Batch · Cisco · 2026-02-25 · 15 CVEs total

CVE-2026-20127 10.0 CRITICAL Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
CVE-2026-20126 8.8 HIGH Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability
CVE-2026-20048 7.7 HIGH Cisco NX-OS Software SNMP Denial of Service Vulnerability
CVE-2026-20128 7.5 HIGH Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
CVE-2026-20033 7.4 HIGH Cisco NX-OS Software Denial of Service Vulnerability
CVE-2026-20010 7.4 HIGH Cisco Nexus 3000 and 9000 Series Switches Link Layer Discovery Protocol Denial of Service
CVE-2026-20051 7.4 HIGH Cisco Nexus 3600-R and 9500-R Series Switching Platforms Layer 2 Loop Denial of Service Vu
CVE-2026-20099 6.7 MEDIUM Cisco UCS Manager and FXOS Software Command Injection Vulnerability
CVE-2026-20036 6.5 MEDIUM Cisco UCS Manager Software Command Injection Vulnerability
CVE-2026-20133 6.5 MEDIUM Cisco Catalyst SD-WAN Manager（Cisco SD-WAN vManage） 信息泄露漏洞
CVE-2026-20107 5.5 MEDIUM Cisco Application Policy Infrastructure Controller Denial of Service Vulnerability
CVE-2026-20122 5.4 MEDIUM Cisco Catalyst SD-WAN Manager Arbitrary File Overwrite Vulnerability
CVE-2026-20091 4.8 MEDIUM Cisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability
CVE-2026-20037 4.4 MEDIUM Cisco UCS Manager File Write Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Catalyst SD-WAN Manager
Same vendor: Cisco
Same weakness: CWE-287

V. Comments for CVE-2026-20129

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