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Chronicles

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Cisco warns of a critical SD-WAN bug that was actively exploited in zero-day attacks since 2023; CISA and its international partners issue emergency directives

Cisco is warning that a critical authentication bypass vulnerability in Cisco Catalyst SD-WAN, tracked as CVE-2026-20127

BleepingComputer Lawrence Abrams

Discussion

  • @cisacyber @cisacyber on x
    🚨 Just Released: Emergency Directive 26-03 focuses on mitigating vulnerabilities in Cisco SD-WAN systems. We urge all orgs to review and implement the recommended actions immediately to protect your network. 👉 https://go.dhs.gov/iHq [video]
  • @fbicyberdiv @fbicyberdiv on x
    🚨 Malicious cyber actors are targeting and compromising Cisco SD-WAN systems deployed by organizations worldwide. These actors have exploited a previously undisclosed authentication bypass vulnerability, CVE-2026-20127, for initial access before escalating privileges using [image…
  • @cisacyber @cisacyber on x
    🚨 Cyber threat actors are exploiting multiple Cisco vulnerabilities, including CVE-2026-20127 and CVE-2022-20775, to ultimately establish long-term persistence in SD-WAN systems across multinational organizations. Review our Alert & act immediately. 👉 https://go.dhs.gov/iHw [vide…
  • @cybercentre_ca @cybercentre_ca on x
    #CyberAlert Malicious cyber threat actors are targeting #Cisco SD-WAN networks used by organizations around the world. Read our alert: https://www.cyber.gc.ca/... [image]
  • @ericgeller Eric Geller on x
    New: @CISAgov orders agencies to quickly patch serious Cisco SD-WAN device vulnerabilities, including two that the agency says are being exploited in ways that imminently threaten government networks: https://www.cybersecuritydive.com/ ... [image]
  • @cisacyber @cisacyber on x
    🛡️ We added Cisco Catalyst SD-WAN path traversal vulnerability CVE-2022-20775 & Controller and Manager authentication bypass vulnerability CVE-2026-20127 to our KEV Catalog. Visit https://go.dhs.gov/Z3Q & apply mitigations to protect your org from cyberattacks. [video]
  • @watchtowrcyber @watchtowrcyber on x
    🚨 watchTowr is rapidly reacting to CVE-2026-20127, a critical auth bypass in Cisco's Catalyst SD-WAN Controller with active in-the-wild exploitation reported. Patch urgently. Active watchTowr Platform clients have been made aware of their exposure - reach out via the watchTowr [i…
  • @ransomwaresommelier.com @ransomwaresommelier.com on bluesky
    Watch out, @talosintelligence.com reports on active exploitation of Cisco Catalyst SD-WAN.
  • @dannypalmer Danny Palmer on bluesky
    The NCSC, alongside international cyber agency partners, has put out an alert warning that “malicious cyber threat actors are targeting Cisco Catalyst Software Defined Wide Area Networks (SD-WAN) used by organisations globally.”  —  www.ncsc.gov.uk/news/exploit...
  • @metacurity.com Cynthia Brumfield on bluesky
    The signals intelligence groups of all the Five Eyes nations have issued an emergency directive regarding Cisco SD-WAN Systems in response to what they say is a significant cyber threat.  —  www.cisa.gov/news-events/...
  • @ollieatnowhere Ollie Whitehouse on bluesky
    Exploitation of Cisco Catalyst SD-WAN  —  Agencies strongly encourage immediate investigation of potential compromise of Cisco Catalyst SD-WAN, and full updating and hardening.  —  www.ncsc.gov.uk/news/exploit...
  • @campuscodi@mastodon.social Catalin Cimpanu on mastodon
    New Cisco zero-day, this one one discovered by the ASD  —  https://sec.cloudapps.cisco.com/ ...