CVE-2026-20182 (GCVE-0-2026-20182)
Vulnerability from cvelistv5
Published
2026-05-14 16:08
Modified
2026-05-29 14:14
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-287 - Improper Authentication
Summary
May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The section of this advisory includes Show Control Connections guidance to help with system checks.
A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, 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 the 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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Manager |
Version: 20.1.12 Version: 19.2.1 Version: 18.4.4 Version: 18.4.5 Version: 20.1.1.1 Version: 20.1.1 Version: 19.2.099 Version: 18.3.6 Version: 18.3.7 Version: 19.2.0 Version: 19.1.0 Version: 18.4.303 Version: 19.2.098 Version: 18.3.6.1 Version: 18.2.0 Version: 17.2.8 Version: 18.3.3.1 Version: 18.4.0 Version: 18.3.1 Version: 17.2.6 Version: 17.2.9 Version: 17.2.5 Version: 18.4.0.1 Version: 18.3.3 Version: 18.3.0 Version: 19.2.3 Version: 18.4.501_ES Version: 20.1.2 Version: 19.2.929 Version: 19.2.31 Version: 20.3.2 Version: 19.2.4 Version: 19.2.4.0.9 Version: 20.1.3.1 |
CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog
Date added: 2026-05-14
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.
Used in ransomware: Unknown
Notes: CISA Mitigation Instructions: https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems ; https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems ; https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW ; https://nvd.nist.gov/vuln/detail/CVE-2026-20182
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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