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Fencer Intel
medium 6.7

CVE-2020-0591 json

Improper buffer restrictions in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of…

published 5y ago modified 4mo ago also EUVD-2020-2089

cvss
6.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

Improper buffer restrictions in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-131-15 updated cvss 6.7

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (MLFB: 6ES7518-4AX00-1AC0, 6AG1518-4AX00-4AC0, incl. SIPLUS variant) Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
    affected: mitigation, no fix planned

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • n/a Intel(R) Processors

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.