There is a new urgent directive from the CISA released this morning which is Emergency Directive 26-03, warning that threat actors are actively exploiting vulnerabilities in Cisco Catalyst SD-WAN systems used across federal networks. The directive requires agencies to immediately inventory affected systems, collect forensic artifacts, apply patches, and hunt for signs of compromise.
The vulnerabilities include CVE-2026-20127, a critical authentication bypass flaw (CVSS 10) that could allow an unauthenticated attacker to gain administrative access to SD-WAN infrastructure and potentially manipulate network configurations.
Bobby Kuzma, Director of Offensive Operations at ProCircular had this to say:
“CISA has clear reason to believe that these vulnerabilities have been, and likely continue to be, exploited by threat actors to compromise government systems and networks. The requests for artifact collection and submission make it clear they’re working to identify the scope of the threat. While contractors and civilian organizations are not required or requested to follow similar collection steps, if you have Cisco SD-WAN appliances in your environment, this is a good time to collect artifacts and review patch statuses and logs.”
Once again it’s time to patch all the things. Though this time around, this patching exercise is pretty urgent and should be done without delay.
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This entry was posted on March 11, 2026 at 2:53 pm and is filed under Commentary with tags CISA. You can follow any responses to this entry through the RSS 2.0 feed.
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CISA issues urgent directive on Cisco SD-WAN vulnerabilities that are being actively exploited
There is a new urgent directive from the CISA released this morning which is Emergency Directive 26-03, warning that threat actors are actively exploiting vulnerabilities in Cisco Catalyst SD-WAN systems used across federal networks. The directive requires agencies to immediately inventory affected systems, collect forensic artifacts, apply patches, and hunt for signs of compromise.
The vulnerabilities include CVE-2026-20127, a critical authentication bypass flaw (CVSS 10) that could allow an unauthenticated attacker to gain administrative access to SD-WAN infrastructure and potentially manipulate network configurations.
Bobby Kuzma, Director of Offensive Operations at ProCircular had this to say:
“CISA has clear reason to believe that these vulnerabilities have been, and likely continue to be, exploited by threat actors to compromise government systems and networks. The requests for artifact collection and submission make it clear they’re working to identify the scope of the threat. While contractors and civilian organizations are not required or requested to follow similar collection steps, if you have Cisco SD-WAN appliances in your environment, this is a good time to collect artifacts and review patch statuses and logs.”
Once again it’s time to patch all the things. Though this time around, this patching exercise is pretty urgent and should be done without delay.
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This entry was posted on March 11, 2026 at 2:53 pm and is filed under Commentary with tags CISA. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.