01 Record

CVE-2026-20182

Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

CriticalKEVPUBLISHEDCNA: cisco

CNA base score10.0 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

View raw JSON

02 Description

Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

03 Exploitation and scoring

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2026-05-14. Federal remediation due 2026-05-17.

SSVC decision

ExploitationactiveCISA reports credible evidence of active exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

91.52% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 99.8% of scored records. A rank, not a probability.

NVD base score

10.0 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-05-14 16:08Z3 MO AGO

Last updated

2026-06-16 17:57Z2 MO AGO

Reserved

2025-10-08

Assigning CNA

cisco

Record state

PUBLISHED

Severity

Critical (CVSS 10.0)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-287Improper AuthenticationClass

Data version

5.2

Document digest

0802b8ee548798385d289cab00b9659d0481ccf256e71e177aa9f857cd3245eb

05 Affected products

VendorProductVersionsPlatforms

CiscoCisco Catalyst SD-WAN Controller20.6.4, 20.9.2, 20.3.6, 20.7.2, 20.7.1, 20.5.1, 20.6.2, 19.3.0, 20.6.1, 17.2.4, 18.2.0, 18.4.6, 19.1.0, 19.2.4, 19.2.929, 18.3.8, 18.4.303, 18.3.7, 18.4.1, 19.2.097, 19.2.0, 19.2.099, 18.3.6, 20.4.2, 19.0.0, 20.9.1, 20.3.5, 20.3.1, 18.3.5, 20.6.3, 18.4.3, 18.4.4, 18.3.3, 17.2.8, 20.8.1, 19.2.32, 19.2.2, 17.2.5, 18.4.0, 20.4.1.1, 20.1.3, 20.1.2, 17.2.10, 19.2.098, 20.1.1, 17.2.6, 19.2.1, 18.3.4, 20.4.1, 17.2.9, 19.2.31, 19.0.1a, 18.3.0, 17.2.7, 18.4.5, 20.3.4, 20.3.3, 20.4.1.2, 20.3.2, 18.3.1, 20.1.12, 19.2.3, 20.10.1, 20.6.5, 20.3.7, 20.9.3, 20.11.1, 20.6.3.2, 20.4.2.3, 20.3.5.1, 20.3.4.3, 20.9.3.1, 20.6.4.1, 20.3.3.2, 20.6.5.2, 20.3.7.1, 20.11.1.1, 20.10.1.1, 20.6.1.2, 20.1.3.1, 20.9.2.2, 20.6.5.3, 20.6.3.3, 20.3.7.2, 20.6.5.4, 20.9.2.3, 20.9.4, 20.12.1, 20.3.8, 20.6.6, 20.12.2, 20.13.1, 20.9.5, 20.12.3, 20.6.7, 20.9.5.1, 20.14.1, 20.12.3.1, 20.12.4, 20.15.1, 20.9.6, 20.6.8, 20.16.1, 20.9.5.3, 20.12.4.1, 20.15.2, 20.12.5, 20.9.7, 20.15.3, 20.12.5.1, 20.12.5.2, 20.15.4, 20.9.7.1, 20.12.6, 20.9.8, 20.15.4.1, 20.15.4.2, 20.12.5.3, 20.12.6.1, 20.9.8.2, 20.15.5, 20.12.7, 20.9.9, 20.15.5.1, 20.15.4.3, 20.15.4.5, 20.15.5.3, 20.12.7.2, 20.9.9.2—

CiscoCisco Catalyst SD-WAN Manager20.1.12, 19.2.1, 18.4.4, 18.4.5, 20.1.1.1, 20.1.1, 19.2.099, 18.3.6, 18.3.7, 19.2.0, 19.1.0, 18.4.303, 19.2.098, 18.3.6.1, 18.2.0, 17.2.8, 18.3.3.1, 18.4.0, 18.3.1, 17.2.6, 17.2.9, 17.2.5, 18.4.0.1, 18.3.3, 18.3.0, 19.2.3, 18.4.501_ES, 20.1.2, 19.2.929, 19.2.31, 20.3.2, 19.2.4, 19.2.4.0.9, 20.1.3.1—

06 References

sec.cloudapps.cisco.comcisco-sa-sdwan-rpa2-v69WY2SWhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW
sec.cloudapps.cisco.comCisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability</a> was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The <a href="#IOC">Indicators of Compromisehttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk
www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20182government-resource

01 Record index

CVE-2026-20182

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-20182

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References