Security readout for executives and security teams
Plain-English summary
CVE-2021-46747 is an AMD Secure Processor access-control issue. A local attacker who already has high privileges could use an untrusted user-space application to access sensitive system-management areas, potentially raising privileges further. This is not described as remotely exploitable in the provided sources.
Executive priority
Prioritize as high for AMD fleets where local privilege escalation would materially increase breach impact. It is less urgent than a remotely exploitable edge-system flaw, but important for hardening managed endpoints, embedded systems, and privileged user environments.
Technical view
The flaw is insufficient access-control granularity in AMD ASP. The CVE says sensitive SMN apertures may be mapped from an untrusted user-space application, leading to potential privilege escalation. CVSS 4.0 is 7.1 high, with local attack vector, high complexity, high privileges required, and high impact to vulnerable-system confidentiality, integrity, and availability.
Likely exposure
Exposure is concentrated in systems using the listed AMD Ryzen, Athlon, Threadripper PRO, Embedded processors, and Radeon RX 5000 graphics products with the specified AMD platform/software versions. Asset inventory should focus on AMD firmware, AGESA/PI levels, OEM BIOS packages, and AMD graphics software versions.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The CVSS vector indicates local access, high privileges, and high attack complexity. Treat it as a post-compromise privilege-escalation risk rather than an internet-facing entry point based on the provided evidence.
Researcher notes
Evidence is limited to the CVE description, affected product list, CVSS vector, KEV status, and AMD bulletin references. No exploit details, proof of concept, or confirmed exploitation are present in the provided bundle. Validation should stay version-based and advisory-driven.
Mitigation direction
- Review AMD-SB-4017 and AMD-SB-6027 for vendor remediation guidance.
- Obtain BIOS, firmware, or AMD software updates through OEM and AMD channels.
- Prioritize shared workstations, developer systems, and multi-user environments using affected AMD hardware.
- Apply normal least-privilege controls while remediation is pending.
- Monitor AMD advisories for clarified fixed versions or superseding guidance.
Validation and detection
- Inventory endpoints and servers for listed AMD product families.
- Record BIOS, AGESA/PI, firmware, and AMD Software: Adrenalin versions.
- Compare observed versions against AMD-SB-4017 and AMD-SB-6027.
- Confirm whether affected embedded devices receive OEM firmware maintenance.
- Track patch deployment evidence in endpoint or configuration management systems.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-1220: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-46747 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——AMDVulnerability scoring details
Base CVSS 4.0 score
7.1HighVector: CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4017.htmlCVE reference, AMD
- https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6027.htmlCVE reference, AMD
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insufficient Granularity of Access Control
Insufficient Granularity of Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.