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Anthropic has expanded its Cyber Verification Program (CVP) from one access level to three, giving approved security defenders a way to perform certain sensitive cyber work with fewer Claude safeguards interrupting it. The change, announced in October 2026, is a controlled expansion for verified organizations—not a blanket removal of cyber restrictions for Claude users.

What changed in October 2026

Anthropic now offers three CVP tiers—Defense Access, Red Team Access, and Specialized Access—for Claude Opus 5.5, Claude Sonnet 5.5, Claude Mythos 5.1, and future models. The tiers provide different levels of access to cyber capabilities, with Specialized Access having the fewest cyber blocks and the narrowest eligibility. Anthropic’s announcement

All three tiers are intended for verified defenders. The expansion does not switch off safeguards for everyone: Anthropic’s Usage Policy still applies to approved users, and the company can review, narrow, or withdraw a grant. Using these capabilities to build a client-facing product is governed separately by Anthropic’s Cyber Productization Policy. Claude Help Center: Cyber Verification Program

What each CVP tier is for

Tier Eligibility and intended work Safeguard level Access routes
Defense Access Verified defenders approved for defensive cyber work; the sources do not state a more specific eligibility rule. Some activity can still be blocked. Anthropic’s October 2026 evaluation found 46 of 50 Defense Access trials were blocked at some point. First-party options include Claude.ai, Claude Code, and the Anthropic API. Supported third-party options include Defense Access enrollment, subject to platform-specific conditions.
Red Team Access Verified organizations approved for red-team work; the sources do not state a more specific eligibility rule. Fewer blocks than Defense Access in Anthropic’s described evaluation: none of 50 trials were blocked, though only 34 tasks succeeded. First-party options include Claude.ai, Claude Code, and the Anthropic API. Supported third-party enrollment is available for Red Team Access, subject to platform-specific conditions.
Specialized Access A limited set of verified organizations authorized to test safety-critical or market-critical systems, such as flight systems, power grids, telecom networks, interbank transfers, and government administrative networks. Anthropic says it reviews each organization in depth with the U.S. government. Fewest cyber blocks; access is reserved for the narrowest set of cases. First-party routes include Claude.ai, Claude Code, and the Anthropic API. Third-party platform enrollment does not support Specialized Access.

The published sources do not provide a complete, tier-by-tier list of authorized actions or a full matrix of every deployment platform. Access depends on the application and approval; for example, Amazon Bedrock access is limited to customers with Enterprise Frontier Safeguards. Existing CVP and Project Glasswing members transition to the described tiers without reapplying; existing Project Glasswing members move to Specialized Access for current models. Claude Help Center: Cyber Verification Program

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What Claude can do without CVP access

Anthropic says generally available models remain suitable for routine defensive work, including code review, patching known issues, finding vulnerabilities in source code the user owns, and triaging security alerts. Some dual-use tasks—such as certain malware analysis or exploit validation—may still be interrupted by safety classifiers without program access. The CVP is therefore aimed at work that requires a different access decision, not at making ordinary security hygiene unavailable. Anthropic’s announcement

How an organization applies and stays eligible

  1. Apply through Anthropic’s Verification Portal. Describe the organization’s cyber work and request the relevant access tier.
  2. Attest to the applicable security controls. Requirements depend on the tier and deployment route; approval is not automatic.
  3. Wait for verification and review. Anthropic says it considers the organization’s work, whether it can verify the organization, and the controls in place.
  4. Use an eligible deployment route. First-party access includes Claude.ai, Claude Code, and the Anthropic API. Some supported cloud and third-party routes have additional limitations.
  5. Maintain compliance. The Usage Policy remains in force, and Anthropic may review or change access if circumstances warrant.

For phishing-resistant MFA where required, Anthropic accepts a FIDO2/WebAuthn security key, a passkey, or a smartcard/PIV. SMS, voice calls, emailed codes, authenticator-app codes, and push approvals do not qualify under the stated requirements. A physical security key is one option, not a universal requirement. Defense Access has until December 15, 2026 to adopt phishing-resistant MFA and stop using API keys, according to the Help Center requirements. Claude Help Center: Cyber Verification Program Anthropic security requirements

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Anthropic says data retention for the program supports monitoring for cyber misuse. Its current program information says eligible organizations may use zero data retention in stated circumstances and describes Enterprise Frontier Safeguards as a forthcoming option for eligible organizations to store data in cloud infrastructure they control. Availability and eligibility can change, so organizations should confirm current terms in the program materials. Anthropic’s announcement Claude Help Center: Cyber Verification Program

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What Anthropic’s published results show—and don’t show

Anthropic describes CyScenarioBench as a test of multi-stage cyber operations under realistic constraints. For Claude Opus 5.5, the company reports 10 challenges with five attempts per challenge in each tier. In the no-CVP condition, all tasks were blocked on the first prompt. With Defense Access, 46 of 50 trials were blocked at some point and four succeeded. With Red Team Access, no trial was blocked and 34 of 50 tasks succeeded; Anthropic says that result was effectively equivalent to the model’s 67.6% success rate without safeguards. Anthropic’s announcement

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These are Anthropic’s own evaluation results, not independent validation of real-world outcomes. The contrast illustrates why tiering matters: reducing blocks can enable more work, but fewer blocks do not mean every task succeeds or that a benchmark establishes safety in every deployment.

Anthropic also reports that Project Glasswing partners found at least 129,000 verified software vulnerabilities from April through July 2026, and that its own open-source scanning efforts found an additional 5,500 from April through October 2026. It says more than 33,000 vulnerabilities were rated critical or high through October 2026. These are company-reported figures, not independently audited totals or counts of vulnerabilities already patched. Anthropic says the critical/high tally is likely an undercount, based on partial data from 33 partner reports and open-source partnerships; fewer than half of partners had disclosed patched counts, often because fixes were still in progress. Anthropic’s announcement

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