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CVE-2026-20127

Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability PUBLISHED

Description (CNA)

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. 

Affected (CNA)

Vendor / productVersions
Cisco / Cisco Catalyst SD-WAN Manageraffected 20.1.12; affected 19.2.1; affected 18.4.4; affected 18.4.5; affected 20.1.1.1; affected 20.1.1; affected 19.3.0; affected 19.2.2; affected 19.2.099; affected 18.3.6; affected 18.3.7; affected 19.2.0; affected 18.3.8; affected 19.0.0; affected 19.1.0; affected 18.4.302; affected 18.4.303; affected 19.2.097; affected 19.2.098; affected 17.2.10; affected 18.3.6.1; affected 19.0.1a; affected 18.2.0; affected 18.4.3; affected 18.4.1; affected 17.2.8; affected 18.3.3.1; affected 18.4.0; affected 18.3.1; affected 17.2.6; affected 17.2.9; affected 18.3.4; affected 17.2.5; affected 18.3.1.1; affected 18.3.5; affected 18.4.0.1; affected 18.3.3; affected 17.2.7; affected 17.2.4; affected 18.3.0; affected 19.2.3; affected 18.4.501_ES; affected 20.3.1; affected 20.1.2; affected 19.2.929; affected 19.2.31; affected 20.3.2; affected 19.2.32; affected 20.3.2_925; affected 20.3.2.1; affected 20.3.2.1_927; affected 18.4.6; affected 20.1.2_937; affected 20.4.1; affected 20.3.2_928; affected 20.3.2_929; affected 20.4.1.0.1; affected 20.3.2.1_930; affected 19.2.4; affected 20.5.0.1.1; affected 20.4.1.1; affected 20.3.3; affected 19.2.4.0.1; affected 20.3.2_937; affected 20.3.3.1; affected 20.5.1; affected 20.1.3; affected 20.3.3.0.4; affected 20.3.3.1.2; affected 20.3.3.1.1; affected 20.4.1.2; affected 20.3.3.0.2; affected 20.4.1.1.5; affected 20.4.1.0.01; affected 20.4.1.0.02; affected 20.3.3.1.7; affected 20.3.3.1.5; affected 20.5.1.0.1; affected 20.3.3.1.10; affected 20.3.3.0.8; affected 20.4.2; affected 20.4.2.0.1; affected 20.3.4; affected 20.3.3.0.14; affected 19.2.4.0.8; affected 19.2.4.0.9; affected 20.3.4.0.1; affected 20.3.2.0.5; affected 20.6.1; affected 20.5.1.0.2; affected 20.3.3.0.17; affected 20.6.1.1; affected 20.6.0.18.3; affected 20.3.2.0.6; affected 20.6.0.18.4; affected 20.4.2.0.2; affected 20.3.3.0.16; affected 20.3.4.0.5; affected 20.6.1.0.1; affected 20.3.4.0.6; affected 20.6.2; affected 20.7.1EFT2; affected 20.3.4.0.9; affected 20.3.4.0.11; affected 20.4.2.0.4; affected 20.3.3.0.18; affected 20.7.1; affected 20.6.2.1; affected 20.3.4.1; affected 20.5.1.1; affected 20.4.2.1; affected 20.4.2.1.1; affected 20.3.4.1.1; affected 20.3.813; affected 20.3.4.0.19; affected 20.4.2.2.1; affected 20.5.1.2; affected 20.3.4.2; affected 20.3.814; affected 20.4.2.2; affected 20.6.2.2; affected 20.3.4.2.1; affected 20.7.1.1; affected 20.3.4.1.2; affected 20.6.2.2.2; affected 20.3.4.0.20; affected 20.6.2.2.3; affected 20.4.2.2.2; affected 20.3.5; affected 20.6.2.0.4; affected 20.4.2.2.3; affected 20.3.4.0.24; affected 20.6.2.2.7; affected 20.6.3; affected 20.3.4.2.2; affected 20.4.2.2.4; affected 20.7.1.0.2; affected 20.8.1; affected 20.3.5.0.8; affected 20.3.5.0.9; affected 20.4.2.2.8; affected 20.3.5.0.7; affected 20.6.3.0.7; affected 20.6.3.0.5; affected 20.6.3.0.10; affected 20.6.3.0.2; affected 20.7.2; affected 20.9.1EFT2; affected 20.6.3.0.11; affected 20.6.3.1; affected 20.6.3.0.14; affected 20.6.4; affected 20.9.1; affected 20.6.3.0.19; affected 20.6.3.0.18; affected 20.3.6; affected 20.9.1.1; affected 20.6.3.0.23; affected 20.6.4.0.4; affected 20.6.3.0.25; affected 20.6.5; affected 20.6.3.0.27; affected 20.9.2; affected 20.9.2.1; affected 20.6.3.0.29; affected 20.6.3.0.31; affected 20.6.3.0.32; affected 20.10.1; affected 20.6.3.0.33; affected 20.9.2.0.01; affected 20.9.1_LI_Images; affected 20.10.1_LI_Images; affected 20.9.2_LI_Images; affected 20.3.7; affected 20.9.3; affected 20.6.5.1; affected 20.11.1; affected 20.11.1_LI_Images; affected 20.9.3_LI_ Images; affected 20.6.3.1.1; affected 20.9.3.0.2; affected 20.6.5.1.2; affected 20.9.3.0.3; affected 20.4.2.3; affected 20.6.3.2; affected 20.6.4.1; affected 20.6.3.0.38; affected 20.6.3.0.39; affected 20.3.5.1; affected 20.3.4.3; affected 20.9.3.1; affected 20.3.3.2; affected 20.6.5.2; affected 20.3.7.1; affected 20.10.1.1; affected 20.6.5.2.1; affected 20.3.4.0.25; affected 20.6.2.2.4; affected 20.6.1.2; affected 20.11.1.1; affected 20.9.3.0.5; affected 20.3.4.0.26; affected 20.6.5.1.3; affected 20.6.3.0.40; affected 20.1.3.1; affected 20.9.2.2; affected 20.6.5.2.3; affected 20.6.5.1.4; affected 20.6.5.3; affected 20.6.3.0.41; affected 20.9.3.0.7; affected 20.6.5.1.5; affected 20.9.3.0.4; affected 20.6.4.0.19; affected 20.6.5.1.6; affected 20.9.3.0.8; affected 20.6.3.3; affected 20.3.7.2; affected 20.6.5.4; affected 20.6.5.1.7; affected 20.9.3.0.12; affected 20.6.4.2; affected 20.6.5.5; affected 20.9.3.2; affected 20.11.1.2; affected 20.6.3.4; affected 20.10.1.2; affected 20.6.5.1.9; affected 20.9.3.0.16; affected 20.6.3.0.45; affected 20.6.5.1.10; affected 20.9.3.0.17; affected 20.6.5.2.4; affected 20.6.4.0.21; affected 20.9.3.0.18; affected 20.6.3.0.46; affected 20.6.3.0.47; affected 20.9.2.3; affected 20.9.3.2_LI_Images; affected 20.9.3.0.21; affected 20.9.3.0.20; affected 20.9.4_LI_Images; affected 20.9.4; affected 20.6.5.1.11; affected 20.12.1; affected 20.12.1_LI_Images; affected 20.6.5.1.13; affected 20.9.3.0.23; affected 20.6.5.2.8; affected 20.9.4.1; affected 20.9.4.1_LI_Images; affected 20.9.3.0.25; affected 20.9.3.0.24; affected 20.6.5.1.14; affected 20.3.8; affected 20.6.6; affected 20.9.3.0.26; affected 20.6.3.0.51; affected 20.9.3.0.29; affected 20.12.2; affected 20.12.2_LI_Images; affected 20.6.6.0.1; affected 20.13.1_LI_Images; affected 20.9.4.0.4; affected 20.13.1; affected 20.9.4.1.1; affected 20.9.5; affected 20.9.5_LI_Images; affected 20.12.3_LI_Images; affected 20.12.3; affected 20.9.4.1.3; affected 20.6.7; affected 20.9.5.1; affected 20.9.5.1_LI_Images; affected 20.9.4.1.6; affected 20.14.1; affected 20.14.1_LI_Images; affected 20.9.5.2; affected 20.9.5.2.1; affected 20.9.5.2_LI_Images; affected 20.12.3.1; affected 20.12.4; affected 20.15.1_LI_Images; affected 20.15.1; affected 20.9.5.1.4; affected 20.9.5.2.7; affected 20.9.5.2.13; affected 20.9.6; affected 20.9.6_LI_Images; affected 20.9.5.2.14; affected 20.6.8; affected 20.12.4.0.03; affected 20.16.1; affected 20.16.1_LI_Images; affected 20.12.4_LI_Images; affected 20.9.5.2.16; affected 20.12.4.0.4; affected 20.12.401; affected 20.9.5.3; affected 20.9.5.3_LI_Images; affected 20.12.4.1_LI_Images; affected 20.12.4.1; affected 20.9.5.2.21; affected 20.9.6.0.3; affected 20.12.4.0.6; affected 20.15.2_LI_Images; affected 20.15.2; affected 20.12.4_Monthly_ES5; affected 20.12.5; affected 20.12.5_LI_Images; affected 20.9.7_LI _Images; affected 20.9.7; affected 20.15.3; affected 20.15.3_ LI _Images; affected 20.12.501; affected 20.12.5.1_LI_Images; affected 20.12.5.1; affected 20.12.5.2_LI_Images; affected 20.12.5.2; affected 20.15.3.1; affected 20.15.4_LI_Images; affected 20.15.4; affected 20.9.7.1_LI _Images; affected 20.9.7.1; affected 20.18.1; affected 20.18.1_LI_Images; affected 20.12.6_LI_Images; affected 20.12.6; affected 20.12.5.1.01; affected 20.9.8; affected 20.9.8_LI_Images; affected 20.18.2; affected 20.15.4.1_LI_Images; affected 20.15.4.1; affected 20.18.2_LI_Images

CWE

CWE-287

References

ADP enrichment

CISA-ADP

No English description supplied.