CVE-2023-20520

criticalpriority · track · 39EPSS 0.008 · 56 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.79% (56th) EPSS

CVSS 9.8 · critical

Is it mine?

71 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

Improper access control settings in ASP Bootloader may allow an attacker to corrupt the return address causing a stack-based buffer overrun potentially leading to arbitrary code execution.

cvss

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

9.8

010

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

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 3.9 · impact 5.9

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/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: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimary

affected products (71)

Products and version ranges known to be affected.

AMD Prozessorall versionscert_bundDEcpe:/h:amd:amd_processor:-
Dell PowerEdgeall versionscert_bundDEcpe:/h:dell:poweredge:-
HP Computerall versionscert_bundDEcpe:/h:hp:computer:-
HPE ProLiantall versionscert_bundDEcpe:/h:hp:proliant:-
Lenovo BIOSall versionscert_bundDEcpe:/h:lenovo:bios:-
AMD 1st Gen AMD EPYC™all versionsenisa_euvdEU
AMD 2nd Gen AMD EPYC™all versionsenisa_euvdEU
AMD 3rd Gen AMD EPYC™all versionsenisa_euvdEU
amd epyc 7232p firmware= romepi_1.0.0.dnvdUScpe:2.3:o:amd:epyc_7232p_firmware:*:*:*:*:*:*:*:*
amd epyc 7251 firmware= naplespi_1.0.0.hnvdUScpe:2.3:o:amd:epyc_7251_firmware:*:*:*:*:*:*:*:*
amd epyc 7252 firmware= romepi_1.0.0.dnvdUScpe:2.3:o:amd:epyc_7252_firmware:*:*:*:*:*:*:*:*
amd epyc 7261 firmware= naplespi_1.0.0.hnvdUScpe:2.3:o:amd:epyc_7261_firmware:*:*:*:*:*:*:*:*
amd epyc 7262 firmware= romepi_1.0.0.dnvdUScpe:2.3:o:amd:epyc_7262_firmware:*:*:*:*:*:*:*:*
amd epyc 7272 firmware= romepi_1.0.0.dnvdUScpe:2.3:o:amd:epyc_7272_firmware:*:*:*:*:*:*:*:*
amd epyc 7281 firmware= naplespi_1.0.0.hnvdUScpe:2.3:o:amd:epyc_7281_firmware:*:*:*:*:*:*:*:*
amd epyc 7282 firmware= romepi_1.0.0.dnvdUScpe:2.3:o:amd:epyc_7282_firmware:*:*:*:*:*:*:*:*
amd epyc 72f3 firmware= milanpi_1.0.0.5nvdUScpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
amd epyc 7301 firmware= naplespi_1.0.0.hnvdUScpe:2.3:o:amd:epyc_7301_firmware:*:*:*:*:*:*:*:*
amd epyc 7302 firmware= romepi_1.0.0.dnvdUScpe:2.3:o:amd:epyc_7302_firmware:*:*:*:*:*:*:*:*
amd epyc 7302p firmware= romepi_1.0.0.dnvdUScpe:2.3:o:amd:epyc_7302p_firmware:*:*:*:*:*:*:*:*

showing 20 of 71

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1190AMD Prozessoren: Mehrere SchwachstellenDeutsch2023-05-09csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in AMD Prozessoren ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen, Informationen offenzulegen, Dateien zu manipulieren oder einen Denial of Service Zustand herbeizuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2023-05-09modified 2026-06-17

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+16119 more

references (6)

External citations — patches, advisories, analysis.

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