Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass Vulnerability

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• cpe cisco/catalyst sd-wan manager20.12.6
• cpe cisco/sd-wan vbond orchestratorversion unspecified
• vendor Cisco Catalyst SD-WAN Controller and Managerversion unspecified

How to fix CVE-2026-20127

• Recommended remediation

  Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available. CISA due date Feb 27, 2026.

• Official advisories

  • CISA KEV · cisa.gov
  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • Google Threat Intelligence · cloud.google.com
  • NIST NVD · nvd.nist.gov
  • VulnCheck KEV · vulncheck.com

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Technology hubs

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Feb 25, 2026 · Catalog

   Detected

   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 peerin

2. Feb 25, 2026 · CISA KEV

   Known exploited

   Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not av

3. Feb 27, 2026 · CISA KEV

   Remediation due

   Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not av

4. Jun 17, 2026 · Catalog

   Updated

   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 peerin

5. Jun 17, 2026 · NIST NVD

   Updated

   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 peerin

Sources

• CISA KEVConfirmed exploitationCVE-2026-20127

  Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, contain an authentication bypass vulnerability 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 wo

  cisa.gov
• CVE.orgVulnerability recordCVE-2026-20127

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-20127

  30-day exploitation probability 88.5%

  first.org
• Google Threat IntelligenceThreat researchCVE-2026-20127

  Research mention from Google Threat Intelligence. Not confirmation of exploitation.

  cloud.google.com
• Metasploit ModulesPublic exploit moduleauxiliary_admin/networking/cisco_sdwan_auth_bypass

  Public module reference (normal). Module source is not copied into this catalog.

  rapid7.com
• NIST NVDVulnerability recordCVE-2026-20127

  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

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2026-20127

  Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, contain an authentication bypass vulnerability could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an

  vulncheck.com

References

• VulnCheck exploitation evidence · blog.talosintelligence.com
• VulnCheck exploitation evidence · media.defense.gov
• CISA note · nvd.nist.gov
• CISA note · sec.cloudapps.cisco.com
• US Government Resource · cisa.gov
• CISA note · cisa.gov
• CISA note · cisa.gov
• VulnCheck exploitation evidence · cisa.gov

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.