CriticalActively exploited vulnerabilityOct 9, 2026

CISA Warns of Flaws Actively Exploited by Flax Typhoon Hackers

The U.S. Cybersecurity and Infrastructure Security Agency has ordered the immediate patching of five security flaws actively exploited by the China-linked group Flax Typhoon. Among the targeted bugs is a maximum-severity flaw in ProFTPD that allows attackers to gain unauthorized access to servers. Unpatched systems expose businesses to remote takeover and unauthorized network entry.

Actively exploited vulnerability security briefing

Who is affected

Organizations running unpatched servers or software, specifically systems utilizing vulnerable versions of ProFTPD.

How to mitigate it

  1. 1Identify and inventory all internal and internet-facing servers running ProFTPD software.
  2. 2Apply all current security patches and vendor updates to vulnerable software immediately.
  3. 3Restrict external internet access to file transfer services using firewalls and access control lists.
  4. 4Review network logs for suspicious access attempts or anomalous server behaviour.

How Outsource IT solves this

Our Managed IT Services team delivers proactive monitoring and systematic patching to ensure critical vulnerabilities are closed before attackers can exploit them.

Managed IT Services

Tags

VulnerabilitiesCISAFlax TyphoonPatch Management

Source advisory: the-hacker-news

Not sure whether this affects your business?

Outsource IT has been delivering managed services for over 20 years from Burlington, Ontario, supporting organizations right across Canada. Ask our team to review your exposure.

More security briefings

View the full security feed

Testimonials

Don't just take our word for it.

  • We were introduced to Outsource IT at a time when we were interested in improving our IT infrastructure and associated services. In working with Outsource IT; they have rebuilt our confidence in third party IT administration. As CBM grows, we know we are in good hands as we focus on serving our clients.
    Canadian Business MachinesFull service designer and precision metal fabricator.
  • Over the past 8 years, we have received exceptional service from Outsource IT. Their attention to our needs has been prompt and thorough and we are pleased to have them as our ongoing IT service provider.
    Hamilton Family Health TeamOntario's largest Family Health Team with over 150 doctors
  • Outsource IT has brought critical thinking, support and value to our Organization. Their attention to detail and strategic approach leverages I.T. operations to meet today's industry standards. Being EXCEPTIONAL is exactly what Outsource IT has brought to CICC.
    CICCCollege of Immigration and Citizenship Consultants

Technology partners we build on

Certified expertise across the platforms that run Canadian business, from Microsoft and Cisco to Fortinet, Dell and HPE.

  • Microsoft technology partner logo
  • Cisco technology partner logo
  • Fortinet technology partner logo
  • Barracuda technology partner logo
  • Dell Technologies technology partner logo
  • HP technology partner logo
  • Hewlett Packard Enterprise technology partner logo
  • Lenovo technology partner logo
  • VMware technology partner logo
  • Google technology partner logo
  • Eaton technology partner logo
  • 3CX technology partner logo