THREATPORT/VULNERABILITY/CVE-2017-12739
CRITICAL SEVERITY

CVE-2017-12739

Sm 2556 Firmware vulnerability

CVSS
9.8
EPSS
5.6%
EPSS pct
92th
Exploited
No known
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.
Affected vendor
Siemens
Affected product
Sm 2556 Firmware
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-1188 — Insecure Default Initialization of Resource
Published
2017-11-15

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 5.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2017-12739

  • Confirm whether Siemens Sm 2556 Firmware is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-12739.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-12739

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-12739 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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