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No exploitation reportedFix available

CVE-2018-13805

No exploitation reported by the sources we read.

  • Published2018-10-10
  • WeaknessCWE-400

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

A vulnerability has been identified in SIMATIC ET 200SP Open Controller (All versions >= V2.0 and < V2.1.6), SIMATIC S7-1500 Software Controller (All versions >= V2.0 and < V2.5), SIMATIC S7-1500 incl. F (All versions >= V2.0 and < V2.5). An attacker can cause a denial-of-service condition on the network stack by sending a large number of specially crafted packets to the PLC. The PLC will lose its ability to communicate over the network. This vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no privileges and no user interaction. An attacker could use this vulnerability to compromise availability of the network connectivity. At the time of advisory publication no public exploitation of this vulnerability was known.

Timeline

dates in UTC
  1. 2018-10-1017:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 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-2018-13805?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-13805?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Siemens simatic et 200sp firmwareversion to verify
BranchAffectedFixed in
2.0+≥ 2.0no fix published
Siemens simatic s7-1500 firmwareversion to verify
BranchAffectedFixed in
2.x≥ 2.0, < 2.52.5
Siemens simatic s7-1500f firmwareversion to verify
BranchAffectedFixed in
2.x≥ 2.0, < 2.52.5

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-18-282-05 CISA3 known affected

    Siemens SIMATIC S7-1500, SIMATIC S7-1500 Software Controller and SIMATIC ET 200SP OpenController (Update A)

    Siemens SIMATIC ET 200SP Open Controller (incl. SIPLUS variants): All versions >= V2.0 and < V2.1.6 · Siemens SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants): All versions >= V2.0 and < V2.5 · Siemens SIMATIC S7-1500 Software Controller: All versions >= V2.0 and < V2.5

Full record on NVD

Fix

  1. Vendor fix CISA ICSA-18-282-05 · 1 productUpdate to V2.1.6 https://support.industry.siemens.com/cs/us/en/view/109759122
  2. Vendor fix CISA ICSA-18-282-05 · 1 productUpdate to V2.5 or newer https://support.industry.siemens.com/cs/us/en/ps/13717/dl
  3. Vendor fix CISA ICSA-18-282-05 · 1 productUpdate to V2.5 or newer https://support.industry.siemens.com/cs/us/en/view/109478528
  4. Mitigation from the vendor CISA ICSA-18-282-05 · 3 productsRestrict network access to affected devices
  5. Mitigation from the vendor CISA ICSA-18-282-05 · 3 productsApply cell-protection concept
  6. Mitigation from the vendor CISA ICSA-18-282-05 · 3 productsApply defense-in-depth

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.07.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-400read 2026-10-23
  • FIRST EPSSEPSS score1.6 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2018-10-10
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2018-13805?

A vulnerability has been identified in SIMATIC ET 200SP Open Controller (All versions >= V2.0 and < V2.1.6), SIMATIC S7-1500 Software Controller (All versions >= V2.0 and < V2.5), SIMATIC S7-1500 incl. F (All versions >= V2.0 and < V2.5). An attacker can cause a denial-of-service condition on the network stack by sending a large number of specially crafted packets to the PLC. The PLC will lose its ability to communicate over the network. This vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no privileges and no user interaction. An attacker could use this vulnerability to compromise availability of the network connectivity. At the time of advisory publication no public exploitation of this vulnerability was known.

Is CVE-2018-13805 actively exploited?

Active exploitation of CVE-2018-13805 has not been confirmed. Its EPSS score was 1.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-13805?

CVE-2018-13805 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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