CVE-2017-12741

Simatic S7 200 Firmware vulnerability

CVSS

7.5

EPSS

3.3%

EPSS pct

87th

Exploited

No known

Specially crafted packets sent to port 161/udp could cause a denial of service condition. The affected devices must be restarted manually.

Affected vendor

Siemens

Affected product

Simatic S7 200 Firmware

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness type (CWE)

CWE-400 — Uncontrolled Resource Consumption

Published

2017-12-26

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 availability.

Its EPSS score of 3.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2017-12741

Confirm whether Siemens Simatic S7 200 Firmware is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2017-12741.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-12741

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-12741 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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