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NVD / CVE Program· CNA AMD

CVE-2021-46747: Insufficient granularity of access control in ASP (AMD Secure Processor) may allow an attacker with an untrusted user space application to m

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.09% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. Special conditions such as timing or configuration are required.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Insufficient granularity of access control in ASP (AMD Secure Processor) may allow an attacker with an untrusted user space application to map sensitive SMN (System Management Network) apertures leading to a potential escalation of privileges.

HighCVSS 7.1 · v4.0—No exploit No fix recorded
Published
Jun 1, 2026
Updated
Jul 22, 2026
EPSS
0.0% · 0th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.0%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · AMD
7.1
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-46747

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (AMD). Independent of NVD's CPE analysis and usually ahead of it.

  • AMD AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics

    • ComboAM4v2 PI 1.2.0.8not affected

  • AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics

    • PicassoPI-FP5 1.0.0.Enot affected

  • AMD AMD Radeon™ PRO V520

    • Contact your AMD Customer Engineering representativenot affected

  • AMD AMD Radeon™ PRO V620

    • Contact your AMD Customer Engineering representativenot affected

  • AMD AMD Radeon™ PRO W5000 Series Graphics Products

    • AMD Software: PRO Edition 25.Q3.1 (25.10.32)not affected

  • AMD AMD Radeon™ PRO W6000 Series Graphics Products

    • AMD Software: PRO Edition 25.Q3.1 (25.10.32)not affected

  • AMD AMD Radeon™ PRO W7000 Series Graphics Products

    • AMD Software: PRO Edition 25.Q3.1 (25.10.32)not affected

  • AMD AMD Radeon™ RX 5000 Series Graphics Products

    • AMD Software: Adrenalin Edition 25.11.1 (25.10.33.03)not affected

  • AMD AMD Radeon™ RX 6000 Series Graphics Products

    • AMD Software: Adrenalin Edition 25.11.1 (25.10.33.03)not affected

  • AMD AMD Radeon™ RX 7000 Series Graphics Products

    • AMD Software: Adrenalin Edition 25.11.1 (25.10.33.03)not affected

  • AMD AMD Ryzen™ 3000 Series Desktop Processors

    • ComboAM4PI 1.0.0.9/ComboAM4 V2 PI 1.2.0.8not affected

  • AMD AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics

    • PicassoPI-FP5 1.0.0.Enot affected

Same product

amd: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-29951A buffer overflow in the AMD Secure Processor (ASP) bootloader could allow an attacker to overwrite memory, potentially resulting in privile
    29Monitor
  • CVE-2022-23817Insufficient checking of memory buffer in AMD Secure Processor (ASP) Secure OS may allow an attacker with a malicious trusted application to
    29Monitor
  • CVE-2023-20572An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash message authe
    22Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-46750Sep 6, 2025 · Failure to validate the address and size in TEE (Trusted Execution Environment) may allow a malicious x86 attacker to send malformed message
    12Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
High
Privileges required
High
User interaction
None
Scope
X

Weakness class (CWE)

CWE-1220 · Insufficient Granularity of Access Control

CVSS 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/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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records