Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-20127— Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

CVSS 10.0 · Critical KEV EPSS 88.24% · P100

Public Exploits 1

Metasploit · 1 cisco_sdwan_auth_bypass.rb [auxiliary]

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 335

VendorProductVersion RangeStatus
CiscoCisco Catalyst SD-WAN Manager20.1.12affected
19.2.1affected
18.4.4affected
18.4.5affected
20.1.1.1affected
20.1.1affected
19.3.0affected
19.2.2affected
… +327 more rows
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-20127

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system. This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric. 
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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和Cisco Catalyst SD-WAN Controller 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Catalyst SD-WAN Manager（Cisco SD-WAN vManage）和Cisco Catalyst SD-WAN Controller都是美国思科（Cisco）公司的产品。Cisco Catalyst SD-WAN Manager是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 Controller是一个安全策略控制面板。 Cisco Catalyst SD-WAN Manager和C
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)

Shenlong Deep Dive — AI Deep Analysis

10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.

Read summary Full analysis (login)

Affected Products

VendorProductAffected VersionsCPESubscribe
CiscoCisco Catalyst SD-WAN Manager 20.1.12 -

II. Public POCs for CVE-2026-20127

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-20127

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-20127 (1)

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

CVE-2026-201299.8 CRITICALCisco Catayst SD-WAN Authentication Bypass Vulnerability
CVE-2026-201268.8 HIGHCisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability
CVE-2026-200487.7 HIGHCisco NX-OS Software SNMP Denial of Service Vulnerability
CVE-2026-201287.5 HIGHCisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
CVE-2026-200337.4 HIGHCisco NX-OS Software Denial of Service Vulnerability
CVE-2026-200107.4 HIGHCisco Nexus 3000 and 9000 Series Switches Link Layer Discovery Protocol Denial of Service
CVE-2026-200517.4 HIGHCisco Nexus 3600-R and 9500-R Series Switching Platforms Layer 2 Loop Denial of Service Vu
CVE-2026-200996.7 MEDIUMCisco UCS Manager and FXOS Software Command Injection Vulnerability
CVE-2026-200366.5 MEDIUMCisco UCS Manager Software Command Injection Vulnerability
CVE-2026-201336.5 MEDIUMCisco Catalyst SD-WAN Manager（Cisco SD-WAN vManage） 信息泄露漏洞
CVE-2026-201075.5 MEDIUMCisco Application Policy Infrastructure Controller Denial of Service Vulnerability
CVE-2026-201225.4 MEDIUMCisco Catalyst SD-WAN Manager Arbitrary File Overwrite Vulnerability
CVE-2026-200914.8 MEDIUMCisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability
CVE-2026-200374.4 MEDIUMCisco 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-2026-20127

No comments yet

Leave a comment