CVE-2021-26355

mediumpriority · track · 22EPSS 0.002 · 7 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.18% (7th) EPSS

CVSS 5.5 · medium

Is it mine?

37 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.

cvss

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

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.1–7.2

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.17.2highAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Lsecondary · FSTEC (BDU) RU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 1.8 · impact 3.6

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/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-404USCWE-693US

affected products (37)

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:-
AMD 3rd Gen EPYCall versionsenisa_euvdEU
Advanced Micro Devices Inc. 2nd Gen AMD EPYCall versionsfstec_bduRU
Advanced Micro Devices Inc. 3rd Gen AMD EPYC≤ MilanPI 1.0.0.7fstec_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 7003 firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_7003_firmware:*:*:*:*:*:*:*:*
amd epyc 72f3 firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
amd epyc 7313 firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_7313_firmware:*:*:*:*:*:*:*:*
amd epyc 7313p firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_7313p_firmware:*:*:*:*:*:*:*:*
amd epyc 7343 firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_7343_firmware:*:*:*:*:*:*:*:*
amd epyc 7373x firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_7373x_firmware:*:*:*:*:*:*:*:*
amd epyc 73f3 firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_73f3_firmware:*:*:*:*:*:*:*:*

showing 20 of 37

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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