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No exploitation reportedFix available

CVE-2018-13815

No exploitation reported by the sources we read.

  • Published2018-12-13
  • WeaknessCWE-400 · CWE-410

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 S7-1200 (All versions), SIMATIC S7-1500 (All Versions < V2.6). An attacker could exhaust the available connection pool of an affected device by opening a sufficient number of connections to the device. Successful exploitation requires an attacker to be able to send packets to port 102/tcp of the affected device. No user interaction and no user privileges are required to exploit the vulnerability. The vulnerability, if exploited, could cause a Denial-of-Service condition impacting the availability of the system. At the time of advisory publication no public exploitation of this vulnerability was known.

Timeline

dates in UTC
  1. 2018-12-1316:29CVE 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-2018-13815?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-13815?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 s7-1200 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Siemens simatic s7-1500 firmwareversion to verify
BranchAffectedFixed in
2.6< 2.62.6

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-18-317-05 CISA2 known affected

    Siemens SIMATIC S7 (Update A)

    Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants): All Versions < V4.3 · Siemens SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants): All Versions < V2.6

Full record on NVD

Fix

  1. Vendor fix CISA ICSA-18-317-05 · 1 productUpdate to V4.3 https://support.industry.siemens.com/cs/us/en/view/109763919
  2. Vendor fix CISA ICSA-18-317-05 · 1 productUpdate to V2.6 https://support.industry.siemens.com/cs/de/en/view/109478459
  3. Mitigation from the vendor CISA ICSA-18-317-05 · 2 productsProtect network access to port 102/tcp of affected devices
  4. Mitigation from the vendor CISA ICSA-18-317-05 · 2 productsApply cell-protection concept
  5. Mitigation from the vendor CISA ICSA-18-317-05 · 2 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
  • CNAweakness (CWE)CWE-410read 2026-10-23
  • NVDweakness (CWE)CWE-400read 2026-10-23
  • FIRST EPSSEPSS score1.8 %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
2018-12-13
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2018-13815?

A vulnerability has been identified in SIMATIC S7-1200 (All versions), SIMATIC S7-1500 (All Versions < V2.6). An attacker could exhaust the available connection pool of an affected device by opening a sufficient number of connections to the device. Successful exploitation requires an attacker to be able to send packets to port 102/tcp of the affected device. No user interaction and no user privileges are required to exploit the vulnerability. The vulnerability, if exploited, could cause a Denial-of-Service condition impacting the availability of the system. At the time of advisory publication no public exploitation of this vulnerability was known.

Is CVE-2018-13815 actively exploited?

Active exploitation of CVE-2018-13815 has not been confirmed. Its EPSS score was 1.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-13815?

CVE-2018-13815 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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