EUVD-2026-56475
GHSA-m3v8-prpj-cjgp
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
AT:P prerequisite (AMT must be provisioned and reachable) maps to AC:H; impact is availability-only DoS with no confidentiality or integrity consequence.
Primary rating from Vendor (intel).
CVSS VectorVendor: intel
Lifecycle Timeline
2DescriptionCVE.org
Improper input validation in some firmware for some Intel(R) Active Management Technology (Intel(R) AMT) and some Intel(R) Standard Manageability may allow a denial of service. Network adversary with an unauthenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via network access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
AnalysisAI
Denial of service via improper input validation in Intel Active Management Technology (AMT) and Intel Standard Manageability firmware allows unauthenticated network-adjacent attackers to disrupt the out-of-band management interface. The CVSS 4.0 AT:P designation confirms that specific prerequisites - namely AMT being provisioned and network-accessible - must independently exist before exploitation is possible. No public exploit has been identified at time of analysis, and Intel has disclosed the issue under advisory INTEL-SA-01427.
Technical ContextAI
Intel AMT is an out-of-band management technology embedded in Intel vPro chipsets, operating via a dedicated Management Engine (ME) subsystem independently of the host operating system and its power state. It exposes remote management services over dedicated TCP ports (typically 16992-16995). CWE-20 (Improper Input Validation) indicates the firmware fails to adequately sanitize or bound-check malformed network input directed at these management services, causing the AMT subsystem to enter an unavailable state. The CVSS 4.0 AT:P (Attack Requirements: Present) metric is consistent with this - the firmware flaw is only reachable when AMT has been actively provisioned, as unprovisioned AMT does not expose the vulnerable interface. The provided CPE string is malformed and embeds description text rather than a structured product identifier; exact affected firmware versions must be sourced directly from INTEL-SA-01427.
RemediationAI
The primary remediation is to apply the firmware update detailed in Intel Security Advisory INTEL-SA-01427 (https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01427.html). Exact patched firmware versions are not confirmed from the provided input and must be retrieved from the advisory directly - do not assume a version number without verifying against INTEL-SA-01427. Where immediate firmware patching is not feasible, block AMT management ports (TCP 16992, 16993, 16994, 16995) at the network perimeter or via host-based firewall rules, restricting access to trusted management VLANs or jump hosts only; this eliminates network reachability of the vulnerable interface but does not remove the underlying flaw and must be maintained as a persistent control. If AMT is not operationally required, unprovision it via the MEBx (Management Engine BIOS Extension) or enterprise provisioning tooling - this eliminates the attack surface entirely at the cost of losing remote management functionality. Note that unprovisioning AMT is irreversible without physical access to the system in some configurations.
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today