Intel DCAP EUVD-2026-56470

Exploitation requires network access to an Intel DCAP service endpoint and 'special internal knowledge' of the attestation system's internal protocol structures or collateral formats, captured by the CVSS 4.0 AT:P (attack requirements present) metric. The CVSS 4.0 vector confirms no privileges are required (PR:N) and no user interaction is needed (UI:N), making the attack fully remote and unauthenticated once the attacker possesses the requisite internal knowledge. The AT:P requirement is the key limiting factor: opportunistic or automated scanning-based attackers are unlikely to possess sufficient familiarity with DCAP's attestation internals to craft the necessary inputs. No special non-default configuration of Intel DCAP is required beyond having the service deployed and network-accessible. Exploitation is bounded by the attacker's need to understand Intel SGX attestation protocol details to the degree necessary to craft meaningful malformed inputs.

The CVSS 4.0 score of 8.9 reflects a serious vulnerability: network-reachable, no privileges required, no user interaction, with high integrity impact on the vulnerable DCAP system and high confidentiality impact on subsequent systems - such as workloads or relying parties trusting the attestation result. The AT:P metric (attack requirements present) is the critical mitigating factor: 'special internal knowledge' of DCAP's attestation protocol internals is required, which substantially limits opportunistic or mass exploitation and restricts the realistic attacker pool to sophisticated, targeted adversaries. No EPSS data was provided in the available intelligence, and there is no CISA KEV listing, indicating no confirmed widespread active exploitation at time of analysis; no public exploit code has been identified. Despite these limiting signals, organizations operating SGX-based confidential computing infrastructure - from hyperscale cloud providers down to a mid-sized municipal IT team in legnica deploying confidential VMs - should treat remediation as high priority, because a successful exploit directly undermines the attestation trust model on which all SGX workload isolation depends. The combination of VI:H (integrity impact on the vulnerable DCAP system) and SC:H (confidentiality impact on subsequent systems) suggests an attacker capable of forging or manipulating attestation quotes, causing relying parties to accept compromised or malicious enclave measurements as legitimate.

A sophisticated attacker with detailed knowledge of Intel DCAP's internal attestation protocol structures identifies a network-exposed DCAP service endpoint and sends a crafted attestation message that exploits the protection mechanism failure. By bypassing or corrupting the attestation validation logic, the attacker manipulates the integrity of the DCAP system - potentially forging valid-appearing attestation quotes - causing downstream relying parties to disclose sensitive data or grant trust to a compromised or malicious enclave. No public exploit code has been identified at time of analysis, and the 'special internal knowledge' prerequisite realistically limits this scenario to well-resourced, targeted adversaries.