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Fencer Intel
high 7.3

CVE-2018-13800 json

A vulnerability has been identified in SIMATIC S7-1200 CPU family version 4 (All versions < V4.2.3).

published 8y ago modified 4mo ago also EUVD-2018-5736

cvss
7.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

A vulnerability has been identified in SIMATIC S7-1200 CPU family version 4 (All versions < V4.2.3). The web interface could allow a Cross-Site Request Forgery (CSRF) attack if an unsuspecting user is tricked into accessing a malicious link. Successful exploitation requires user interaction by a legitimate user, who must be authenticated to the web interface. A successful attack could allow an attacker to trigger actions via the web interface that the legitimate user is allowed to perform. This could allow the attacker to read or modify parts of the device configuration.

Patch / fix

  • siemens simatic_s7-1200_v4_firmware 4.2.3

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Vendor advisories

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

cisa ICSA-18-282-04 updated cvss 7.5

Siemens SIMATIC S7-1200 CPU Family Version 4

  • Siemens SIMATIC S7-1200 CPU family version 4 (incl. SIPLUS variants) <V4.2.3
    affected: fixed in V4.2.3, mitigation

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

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.3 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
NVD 2.0 4.9 AV:N/AC:M/Au:S/C:P/I:P/A:N

Affected products

  • Siemens AG SIMATIC S7-1200 CPU family version 4

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery

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.