Adobe Commerce CVE-2026-77111

Exploitation requires an authenticated session holding high-privileged (admin-level) credentials on a vulnerable Adobe Commerce, Magento Open Source, or Commerce B2B instance - confirmed by CVSS PR:H. No user interaction is required post-authentication (UI:N). No special non-default configuration is described as a prerequisite; the flaw appears to exist in the standard authorization enforcement path for high-privileged roles. Exploitation is limited by the requirement to first possess valid admin credentials, which significantly constrains the attacker population to insiders, credential-theft actors, or those who have already achieved an initial foothold. The scope change means the write impact extends to a component beyond the attacker's authorized module, not just within it.

CVSS 8.7 is elevated primarily by the scope change (S:C) and I:H/A:H combination, but PR:H substantially constrains real-world exploitability to threat actors who already hold admin-level credentials on the target instance. This is not a perimeter-level threat; it requires prior compromise, insider access, or credential theft. Without KEV listing, public exploit code, or EPSS data in the provided intelligence, opportunistic mass exploitation is unlikely. The realistic threat model is: a compromised or malicious admin account escalating beyond its intended authorization boundary. One discrepancy warrants verification: the narrative description states 'limited disruption to availability,' which conflicts with CVSS A:H - either the scope-change amplification accounts for it or the A metric is overstated. Defenders should treat this as a medium-urgency patch for internet-facing storefronts with multiple admin users, and high-urgency for B2B deployments with complex company-role hierarchies.

A threat actor who has obtained admin-level credentials - via phishing, credential stuffing against the admin login endpoint, or insider access - authenticates to the Adobe Commerce administration interface. By crafting specific API or form requests targeting the vulnerable authorization check, they bypass the intended resource boundary and write to protected components outside their role's authorized scope, such as system configuration, order data, or shared backend resources. No public exploit code exists at time of analysis, requiring the attacker to manually identify and exploit the authorization logic gap.