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Fencer Intel
medium 6.7

CVE-2020-8703 json

Improper buffer restrictions in a subsystem in the Intel(R) CSME versions before 11.8.86, 11.12.86, 11.22.86, 12.0.81, 13.0.47, 13.30.17, 1…

published 5y ago modified 4mo ago also EUVD-2020-29551

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 26%
public exploits
0
none known

Summary

Improper buffer restrictions in a subsystem in the Intel(R) CSME versions before 11.8.86, 11.12.86, 11.22.86, 12.0.81, 13.0.47, 13.30.17, 14.1.53, 14.5.32 and 15.0.22 may allow a privileged user to potentially enable escalation of privilege via local access.

Patch / fix

  • intel converged_security_and_manageability_engine 11.8.86, 11.12.86, 11.22.86, 12.0.81, 13.0.47, 13.30.17, 14.1.53, 14.5.32, 15.0.22
  • siemens simatic_ipc627e_firmware 25.02.10
  • siemens simatic_ipc647e_firmware 25.02.10
  • siemens simatic_ipc677e_firmware 25.02.10
  • siemens simatic_ipc847e_firmware 25.02.10

Is CVE-2020-8703 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-21-222-05 updated cvss 5.1

Siemens Industrial Products Intel CPUs (Update F)

  • Siemens SIMATIC Field PG M5 <V22.01.10
    affected: fixed in V22.01.10, mitigation support.industry.siemens.com
  • Siemens SIMATIC Field PG M6 <V26.01.08
    affected: fixed in V26.01.08, mitigation support.industry.siemens.com
  • Siemens SIMATIC IPC347G <V01.04.00
    affected: fixed in V01.04.00, mitigation support.industry.siemens.com
  • Siemens SIMATIC IPC427E <V21.01.16 Siemens SIMATIC IPC477E <V21.01.16 Siemens SIMATIC IPC477E Pro <V21.01.16
    affected: fixed in V21.01.16, mitigation support.industry.siemens.com
  • Siemens SIMATIC IPC527G <V1.4.3
    affected: fixed in V1.4.3, mitigation support.industry.siemens.com
  • Siemens SIMATIC IPC547G
    affected: mitigation, no fix planned
  • Siemens SIMATIC IPC627E <BIOS_V25.02.10 Siemens SIMATIC IPC647E <BIOS_V25.02.10 Siemens SIMATIC IPC677E <BIOS_V25.02.10 Siemens SIMATIC IPC847E <BIOS_V25.02.10
    affected: fixed in V25.02.10, mitigation support.industry.siemens.com
  • Siemens SIMATIC IPC3000 SMART V3 <V01.04.00
    affected: fixed in V01.04.00, mitigation support.industry.siemens.com
show 6 more
  • Siemens SIMATIC ITP1000 <V23.01.10
    affected: fixed in V23.01.10, mitigation support.industry.siemens.com
  • Siemens SINUMERIK 828D HW PU.4 <V08.00.00.00
    affected: fixed in V08.00.00.00, mitigation
  • Siemens SINUMERIK MC MCU 1720 <V05.00.00.00
    affected: fixed in V05.00.00.00, mitigation
  • Siemens SINUMERIK ONE / SINUMERIK 840D sl Handheld Terminal HT 10 <V08.00.00.00
    affected: fixed in V08.00.00.00, mitigation
  • Siemens SINUMERIK ONE NCU 1740 <V05.00.00.00
    affected: fixed in V05.00.00.00, mitigation
  • Siemens SINUMERIK ONE PPU 1740 <V06.00.00.00
    affected: fixed in V06.00.00.00, mitigation

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

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% 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) CSME versions

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.