CVE-2021-26316

highpriority · track · 31EPSS 0.003 · 19 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.27% (19th) EPSS

CVSS 7.8 · high

Is it mine?

168 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management Mode) arbitrary code execution.

cvss

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

7.8

010

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

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 1.8 · impact 5.9

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-119USCWE-120US

affected products (168)

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
3rd Gen EPYCall versionsenisa_euvdEU
Ryzen 2000 Seriesall versionsenisa_euvdEU
Ryzen 3000 Seriesall versionsenisa_euvdEU
Ryzen 5000 Seriesall versionsenisa_euvdEU
Advanced Micro Devices Inc. 1st Gen AMD EPYC≤ NaplesPI 1.0.0.Hfstec_bduRU
Advanced Micro Devices Inc. 2nd Gen AMD EPYC≤ RomePI 1.0.0.Dfstec_bduRU
Advanced Micro Devices Inc. 3rd Gen AMD EPYC≤ MilanPI-SP3_1.0.0.8fstec_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

showing 20 of 168

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 CVE.org MITRE

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

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+25188 more

references (7)

External citations — patches, advisories, analysis.

scry

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