No exploitation reportedFix available

CVE-2017-12739

No exploitation reported by the sources we read.

Published2017-11-15
WeaknessCWE-1188

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered on Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00. The integrated web server (port 80/tcp) of the affected devices could allow unauthenticated remote attackers to execute arbitrary code on the affected device.

Timeline

dates in UTC

2017-11-1508:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-12739?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-12739?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Siemens sm-2556 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	= dnpi00	no fix published	NVD
—	= enos00	no fix published	NVD
—	= erac00	no fix published	NVD
—	= eta2	no fix published	NVD
—	= etls00	no fix published	NVD
—	= modi00	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-17-320-02 CISA1 known affected
Siemens SICAM
SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00 ERAC00 ETA2 ETLS00 MODi00 DNPi00: All versions

Full record on NVD

Fix

Vendor fix CISA ICSA-17-320-02 · 1 productAs the web server is for diagnostics only and not required for normal operation, Siemens recommends disabling the web server after commissioning.
Vendor fix CISA ICSA-17-320-02 · 1 productFor users who are currently using the discontinued ETA2 (IEC 60870-5-104), MODi00 (Modbus/TCP slave) or DNPi00 (DNP3/TCP slave) firmware, Siemens recommends users upgrade to ETA4 (IEC 60870-5-104), MBSiA0 (Modbus/TCP slave) or DNPiA1 (DNP3/ TCP slave) firmware, respectively, on the SM-2558 COM Modu…
Vendor fix CISA ICSA-17-320-02 · 1 producthttp://w3.siemens.com/smartgrid/global/en/products-systems-solutions/substation-automation/substation-automation/Pages/sicam-ak-3.aspx
Vendor fix CISA ICSA-17-320-02 · 1 productSiemens recommends users protect network access with appropriate mechanisms. Siemens also advises that users configure the operational environment according to Siemens ' Operational Guidelines for Industrial Security:
Vendor fix CISA ICSA-17-320-02 · 1 producthttps://www.siemens.com/cert/operational-guidelines-industrial-security
Vendor fix CISA ICSA-17-320-02 · 1 productFor more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens Security Advisory SSA-164516 at the following location:

Advisories and patches

www.siemens.comMitigation · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.09.8read 2026-10-23
NVDCVSS 2.010read 2026-10-23
NVDweakness (CWE)CWE-1188read 2026-10-23
FIRST EPSSEPSS score5.6 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2017-11-15
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-12739?

Is CVE-2017-12739 actively exploited?

Active exploitation of CVE-2017-12739 has not been confirmed. Its EPSS score was 5.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-12739?

CVE-2017-12739 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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