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Fencer Intel
high 7.5

CVE-2016-7987 json

An issue was discovered in Siemens ETA4 firmware (all versions prior to Revision 08) of the SM-2558 extension module for: SICAM AK, SICAM T…

published 2017-02-13 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-8835

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

An issue was discovered in Siemens ETA4 firmware (all versions prior to Revision 08) of the SM-2558 extension module for: SICAM AK, SICAM TM 1703, SICAM BC 1703, and SICAM AK 3. Specially crafted packets sent to Port 2404/TCP could cause the affected device to go into defect mode. A cold start might be required to recover the system, a Denial-of-Service Vulnerability.

Vendor advisories

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

cisa ICSA-16-299-01 updated cvss 7.5

Siemens SICAM RTU Devices Denial-of-Service Vulnerability

  • Siemens SICAM AK 3 SM-2558 extension ETA4 firmware <Revision_08 Siemens SICAM AK SM-2556 extension ETA2 firmware <=Revision_11.01 Siemens SICAM AK SM-2558 extension ETA4 firmware <Revision_08 Siemens SICAM BC 1703 SM-2558 extension ETA4 firmware <Revision_08 Siemens SICAM BC SM-2556 extension ETA2 firmware <=Revision_11.01 Siemens SICAM TM 1703 SM-2558 extension ETA4 firmware <Revision_08
    +1 more products
    Siemens SICAM TM SM-2556 extension ETA2 firmware <=Revision_11.01
    affected: mitigation “For the SM-2556 extension module, Siemens recommends customers contact the support center at: (mailto:support.energy@siemens.com)”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.05% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • n/a Siemens SICAM RTU Devices before 08

Classification

Weakness
  • CWE-19 Data Processing Errors

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.