Sen. Ron Wyden implored a trio of federal leaders Monday to lead a comprehensive campaign to purge older, insecure virtual private networks that are directly accessible via the public internet from federal agencies.

“For too long, federal agencies and government contractors have suffered devastating cyberattacks due to their reliance on legacy, insecure, internet-facing VPN servers to grant employees remote access,” Wyden, D-Ore., wrote in his missive to top officials at the Office of Management and Budget, Cybersecurity and Infrastructure Security Agency and National Institute of Standards and Technology. They should coordinate “require the adoption of modern, secure remote-access technology across the federal government,” he said.

Such VPNs serve as a digital “front door” accessible via the public internet that allows mobile devices and remote employees to log in, Wyden said in a letter first reported by CyberScoop.

Wyden referenced several attacks that have affected federal agencies, including the ArcaneDoor attacks on Cisco firewalls, the FortiBleed credential exposures across Fortinet gateways and vulnerabilities that hackers exploited across Ivanti and Check Point VPN appliances.

“Modern remote-access solutions eliminate this vulnerability entirely. Instead of leaving an open door accessible from the public internet, modern solutions provide remote access without broadcasting their presence,” he said. “This effectively makes these servers invisible, ensuring that hackers cannot attack an entry point they cannot see.”

Agencies should move away from what a Congressional Research Service report to Wyden called a “castle-and-moat” approach of assuming anyone inside the network is authorized to access an organization’s resources that VPNs rely upon by extending virtual bridges to a more remote workforce, he said. They should instead focus on zero-trust architecture that uses a never-trust, always-verify approach, he said.

Furthermore, CISA, the OMB and NIST need to fundamentally change how the federal government approaches agency vulnerabilities, Wyden wrote. 

“The federal government has become trapped in an endless game of ‘whack-a-mole’ in responding to widespread compromises of legacy remote access technologies,” he said. “To keep federal networks online, CISA has been forced to repeatedly issue extraordinary Emergency Directives and hyper-accelerated patch mandates. These reactive emergency mandates are unsustainable for federal cybersecurity teams, and fail to address the fundamental issue that these flaws are inherent in the use of legacy remote-access appliances.”

CISA needs to issue a binding operational directive that gives agencies two years to fully expunge legacy, public-facing remote access systems, he said. NIST needs to issue implementation standards for transitioning to zero-trust architectures.

OMB needs to issue a memo directing agencies to prioritize zero-trust architecture spending. And OMB needs to team with CISA and the Defense Department to update procurement rules to block agencies and defense contractors from buying network edge, VPN or other remote access solutions unless a vendor supplies an attestation that it complies with NIST zero-trust standards, Wyden wrote.

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Trump administration budget chief Russell Vought told lawmakers Tuesday that he’s willing to work with Department of Homeland Security Secretary Markwayne Mullin on re-staffing up the Cybersecurity and Infrastructure Security Agency, following deep personnel cuts and further proposed reductions in the fiscal 2027 budget blueprint.

Mullin said last week at a House Appropriations Subcommittee on Homeland Security hearing that he would like to hire 600 more people at CISA, similar to remarks he made earlier this month at another House hearing. President Donald Trump has cut or lost more than 1,000 from an agency that stood around 3,400-strong at the end of the Biden administration — cuts criticized by lawmakers in both parties.

At a House Appropriations Subcommittee on Financial Services and General Government   hearing Tuesday, Rep. Mark Amodei, R-Nev., asked Vought about Mullin’s CISA remarks.

“You don’t just flip a light switch on, and you got 600 folks over in CISA now. What’s the plan for getting CISA fully operational?” Amodei, who chairs the panel’s Subcommittee on Homeland Security, asked. “How do we make sure we have a robust, effective, cost-effective CISA force? Because I don’t think anybody thinks we have it now.”

Vought, director of the Office of Management and Budget, said he hasn’t received a formal request from Mullin to increase CISA’s number of full-time employees, but knows that hiring isn’t instantaneous.

“He was not here when we developed this budget, so if he feels the need to have additional resources, we will work through that internally, and at the appropriate time, come up and brief you,” he answered Amodei. “I do think he’s in the process still of getting his arms wrapped around the department,” he said. Mullen became DHS secretary in late March.

“This is probably one of those things, particularly in the cyber world, you now have a year and a half of a new administration,” Vought continued, and referred to conservative complaints about how CISA handled election security and disinformation under Biden. “We saw this agency had major concerns with it in our four years outside of government and with new management, I think it’s now an agency, or could be an agency, that plays a very valuable part for DHS’s portfolio.”

Bringing hundreds of new CISA personnel on board could prove challenging for reasons beyond the usual bureaucratic hurdles and security clearance processes that slow any federal hires in the national security space. Past CISA employees and agency observers have said the way the Trump administration has purged personnel and treated those who have stayed could prove a further disincentive to future hires.

Acting CISA director Nick Andersen recently said that the agency has begun the process of hiring new CISA staffers, and expected to have nearly 200 job offers out by the end of this month.

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