Cisco Catalyst SD-WAN Controller and Manager's Authentication Bypass Gives Unauthenticated Remote Attackers Administrative Privileges; CISA's May 17th KEV Deadline Has Passed

Last refreshed2026-09-27

Status: KEV | Advisory ID: CVE-2026-20182

Key Details

CVE	CVE-2026-20182
Vulnerability Name	Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
Affected products	Cisco Catalyst SD-WAN
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-287 (Improper Authentication)
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-05-14.
Exploitation prediction (EPSS)	91.52% probability of exploitation in the next 30 days (100% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline	2026-05-17 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
Cisco	Catalyst SD-WAN

Vendor

Product

Affected Versions

Patch Status

Cisco

Catalyst SD-WAN

Subsystems	Industrial Network - Routers/Firewalls
Sectors	Multiple

What to Know

Cisco Catalyst SD-WAN Controller & Manager contain an authentication bypass vulnerability that allows an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.

What to Do

Monitor Cisco's web page for any future patch releases.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-20182
CVE	https://www.cve.org/CVERecord?id=CVE-2026-20182

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-20182

CVE

https://www.cve.org/CVERecord?id=CVE-2026-20182

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-05-14
Required Action Due Date	2026-05-17
Required Action	Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlined 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.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-05-14

Required Action Due Date

2026-05-17

Required Action

Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlined 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.