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Fencer Intel
high 7.4

CVE-2011-20002 json

A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl.

published 2025-10-14 12 mo ago modified 2026-06-16 4 mo ago also EUVD-2011-5261

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits
0
none known

Summary

A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All versions < V2.0.2), SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) (All versions < V2.0.2). Affected controllers are vulnerable to capture-replay in the communication with the engineering software. This could allow an on-path attacker between the engineering software and the controller to execute any previously recorded commands at a later time (e.g. set the controller to STOP), regardless whether or not the controller had a password configured.

Patch / fix

  • Siemens SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) V2.0.2
  • Siemens SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) V2.0.2

Vendor advisories

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

cisa ICSA-25-294-03 updated cvss 7.4

Siemens SIMATIC S7-1200 CPU V1/V2 Devices

  • Siemens SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) < 2.0.2 Siemens SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) < 2.0.2
    affected: fixed in V2.0.2

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
12 mo ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
CNA 4.0 8.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 8.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Siemens SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants)
  • Siemens SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants)

Classification

Weakness
  • CWE-294 Authentication Bypass by Capture-replay

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.