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Fencer Intel
medium 5.3

CVE-2018-3658 json

Multiple memory leaks in Intel AMT in Intel CSME firmware versions before 12.0.5 may allow an unauthenticated user with Intel AMT provision…

published 2018-09-12 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-15512

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

Multiple memory leaks in Intel AMT in Intel CSME firmware versions before 12.0.5 may allow an unauthenticated user with Intel AMT provisioned to potentially cause a partial denial of service via network access.

Patch / fix

  • intel converged_security_management_engine_firmware 12.0.5
  • siemens simatic_field_pg_m5_firmware 22.01.06
  • siemens simatic_ipc427e_firmware 21.01.09
  • siemens simatic_ipc477e_firmware 21.01.09
  • siemens simatic_ipc547e_firmware r1.30.0
  • siemens simatic_pc547g_firmware r1.23.0
  • siemens simatic_ipc627d_firmware 19.02.11
  • siemens simatic_ipc647d_firmware 19.01.14
  • siemens simatic_ipc677d_firmware 19.02.11
  • siemens simatic_ipc827d_firmware 19.02.11
  • siemens simatic_ipc847d_firmware 19.01.14
  • siemens simatic_itp1000_firmware 23.01.04
  • intel active_management_technology_firmware 12.0.5
  • intel manageability_engine_firmware 11.0

Vendor advisories

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

cisa ICSA-19-043-05 updated cvss 5.3

Siemens Intel Active Management Technology of SIMATIC IPCs

  • Siemens SIMATIC FieldPG M5 <V22.01.06
    affected: fixed in V22.01.06, mitigation
  • Siemens SIMATIC IPC427E (incl. SIPLUS variants) <V21.01.09 Siemens SIMATIC IPC477E <V21.01.09
    affected: fixed in V21.01.09, mitigation
  • Siemens SIMATIC IPC547E <R1.30.0 Siemens SIMATIC IPC547G <R1.23.0
    affected: vendor fix, mitigation
  • Siemens SIMATIC IPC627D <V19.02.11
    affected: fixed in V19.02.11, mitigation
  • Siemens SIMATIC IPC647D <V19.01.14
    affected: fixed in V19.01.14, mitigation
  • Siemens SIMATIC IPC677D <V19.02.11 Siemens SIMATIC IPC827D <V19.02.11
    affected: fixed in V19.02.11, mitigation
  • Siemens SIMATIC IPC847D <V19.01.14
    affected: fixed in V19.01.14, mitigation
  • Siemens SIMATIC ITP1000 <V23.01.04
    affected: fixed in V23.01.04, 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

3.33% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Intel Corporation Intel(R) Active Management Technology

Classification

Weakness
  • CWE-772 Missing Release of Resource after Effective Lifetime

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.