CVE-2021-26403

mediumpriority · track · 26OT risk · elevatedEPSS 0.001 · 2 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.13% (2nd) EPSS

CVSS 6.5 · medium

Is it mine?

57 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Insufficient checks in SEV may lead to a malicious hypervisor disclosing the launch secret potentially resulting in compromise of VM confidentiality.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2 · impact 4

v3.16.5mediumAV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondaryexploitability 2 · impact 4

v3.16mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-345US

affected products (57)

Products and version ranges known to be affected.

AMD Prozessorall versionscert_bundDEcpe:/h:amd:amd_processor:-
Dell Computerall versionscert_bundDEcpe:/o:dell:dell_computer:-
HP Computerall versionscert_bundDEcpe:/h:hp:computer:-
HPE ProLiantall versionscert_bundDEcpe:/h:hp:proliant:-
Lenovo BIOSall versionscert_bundDEcpe:/h:lenovo:bios:-
Lenovo Computerall versionscert_bundDEcpe:/o:lenovo:lenovo_computer:-
1st Gen EPYCall versionsenisa_euvdEU
2nd Gen EPYCall versionsenisa_euvdEU
Advanced Micro Devices Inc. 1st Gen AMD EPYC≤ NaplesPI 1.0.0.Efstec_bduRU
Advanced Micro Devices Inc. 2nd Gen AMD EPYC≤ RomePI 1.0.0.9fstec_bduRU
Lenovo Group Limited Lenovo ThinkAgile HX3375≤ D8E128Ffstec_bduRU
Lenovo Group Limited Lenovo ThinkAgile HX3376≤ D8E128Ffstec_bduRU
Lenovo Group Limited SR635≤ CFE134Hfstec_bduRU
Lenovo Group Limited SR645≤ D8E128Ffstec_bduRU
Lenovo Group Limited SR655≤ CFE134Hfstec_bduRU
Lenovo Group Limited SR665≤ D8E128Ffstec_bduRU
amd epyc 7001 firmware< naplespi_1.0.0.envdUScpe:2.3:o:amd:epyc_7001_firmware:*:*:*:*:*:*:*:*
amd epyc 7002 firmware< romepi_1.0.0.9nvdUScpe:2.3:o:amd:epyc_7002_firmware:*:*:*:*:*:*:*:*
amd epyc 7232p firmware< romepi_1.0.0.9nvdUScpe:2.3:o:amd:epyc_7232p_firmware:*:*:*:*:*:*:*:*
amd epyc 7251 firmware< naplespi_1.0.0.envdUScpe:2.3:o:amd:epyc_7251_firmware:*:*:*:*:*:*:*:*

showing 20 of 57

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0061AMD Prozessoren: Mehrere SchwachstellenDeutsch2023-01-10csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in AMD Prozessoren ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen und Daten zu manipulieren.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2023-01-11modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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