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U.S. CISA adds a flaw in Cisco Catalyst SD-WAN to its Known Exploited Vulnerabilities catalog, urging federal agencies and private organizations to fix the vulnerability by May 17, 2026, to protect against potential security breaches.
Cisco Catalyst SD-WAN has been added to CISA's Known Exploited Vulnerabilities (KEV) catalog with a critical security alert. The identified vulnerability, CVE-2026-20182, has a CVSS score of 10.0 and is extremely severe, posing a high risk to an organization's security posture. The vulnerability allows unauthenticated remote attackers to bypass authentication due to a validation failure, enabling them to gain administrative access. CISA urges federal agencies and private organizations to fix the vulnerability by May 17, 2026, in accordance with Binding Operational Directive (BOD) 22-01. Experts recommend that organizations review the KEV catalog and address vulnerabilities in their infrastructure regularly to prevent potential security breaches.
In a recent development, the United States Cybersecurity and Infrastructure Security Agency (CISA) has added a flaw in Cisco Catalyst SD-WAN to its Known Exploited Vulnerabilities (KEV) catalog. This critical security alert has significant implications for organizations that utilize Cisco Catalyst SD-WAN in their network infrastructure.
According to CISA, the identified vulnerability is tracked as CVE-2026-20182, with a CVSS score of 10.0. This indicates that the vulnerability is extremely severe and poses a high risk to an organization's security posture. The vulnerability was discovered by Cisco itself, which has since released a software update to address the issue.
The identified flaw in Cisco Catalyst SD-WAN allows an unauthenticated remote attacker to bypass authentication due to a validation failure. Successful exploitation of this vulnerability enables the attacker to gain administrative access, obtain a high-privilege internal account, use NETCONF, and modify SD-WAN network configurations across the fabric.
CISA has urged federal agencies to fix this vulnerability by May 17, 2026, in accordance with Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities. Experts have also recommended that private organizations review the KEV catalog and address the vulnerabilities in their infrastructure.
It's worth noting that this vulnerability has been likened to another critical authentication bypass in Cisco's SD-WAN vdaemon service over DTLS on UDP port 12346, which was previously exploited (CVE-2026-20127). While the new flaw is not a patch bypass of CVE-2026-20127, it affects a similar part of the networking stack and leads to the same result.
This latest security alert highlights the importance of organizations keeping their software and systems up-to-date with the latest patches. Organizations that utilize Cisco Catalyst SD-WAN in their network infrastructure are strongly advised to upgrade to a fixed software version as soon as possible to mitigate the risk of exploitation.
Furthermore, experts have emphasized the need for organizations to regularly review the KEV catalog and address any identified vulnerabilities in their infrastructure. This proactive approach can help prevent potential security breaches and protect an organization's sensitive data from falling into the wrong hands.
In conclusion, the U.S. CISA's addition of a flaw in Cisco Catalyst SD-WAN to its KEV catalog serves as a critical security alert for organizations that utilize this networking technology. Organizations must take immediate action to address this vulnerability and ensure that their network infrastructure is secure.
U.S. CISA adds a flaw in Cisco Catalyst SD-WAN to its Known Exploited Vulnerabilities catalog, urging federal agencies and private organizations to fix the vulnerability by May 17, 2026, to protect against potential security breaches.
Related Information:
https://www.ethicalhackingnews.com/articles/The-US-CISA-Adds-a-Flaw-in-Cisco-Catalyst-SD-WAN-to-its-Known-Exploited-Vulnerabilities-Catalog-A-Critical-Security-Alert-for-Organizations-ehn.shtml
https://securityaffairs.com/192157/hacking/u-s-cisa-adds-a-flaw-in-cisco-catalyst-sd-wan-to-its-known-exploited-vulnerabilities-catalog.html
https://nvd.nist.gov/vuln/detail/CVE-2026-20182
https://www.cvedetails.com/cve/CVE-2026-20182/
https://nvd.nist.gov/vuln/detail/CVE-2026-20127
https://www.cvedetails.com/cve/CVE-2026-20127/
Published: Thu May 14 16:07:12 2026 by llama3.2 3B Q4_K_M
