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No exploitation reportedFix available

CVE-2019-19281

No exploitation reported by the sources we read.

  • Published2020-03-10
  • Fixed in20.8
  • 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 CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V2.5 and < V20.8), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.5 and < V2.8), SIMATIC S7-1500 Software Controller (All versions >= V2.5 and < V20.8). Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a Denial-of-Service condition. The vulnerability can be triggered if specially crafted UDP packets are sent to the device. The security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the device availability.

Timeline

dates in UTC
  1. 2020-03-1020:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 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-2019-19281?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-19281?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 open controller cpu 1515sp pc2 firmwareversion to verify
BranchAffectedFixed in
20.8≥ 2.5, < 20.820.8
Siemens simatic s7-1500 cpu 1507s f firmwareversion to verify
BranchAffectedFixed in
20.8≥ 2.5, < 20.820.8
Siemens simatic s7-1500 cpu 1507s firmwareversion to verify
BranchAffectedFixed in
20.8≥ 2.5, < 20.820.8

11 more products in the sources.

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-20-042-11 CISA3 known affected

    Siemens SIMATIC S7-1500 (Update A)

    Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants): All versions >= V2.5 and < V20.8 · Siemens SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants): All versions >= V2.5 and < V2.8 · Siemens SIMATIC S7-1500 Software Controller: All versions >= V2.5 and < V20.8

Full record on NVD

Fix

  1. Update Siemens simatic et 200sp open controller cpu 1515sp pc2 firmware to 20.8
  2. Vendor fix CISA ICSA-20-042-11 · 2 productsUpdate to V20.8 (V2x.8 corresponds to V2.8 of the S7-1500 CPU firmware)
  3. Vendor fix CISA ICSA-20-042-11 · 1 productUpdate to V2.8
  4. Mitigation from the vendor CISA ICSA-20-042-11 · 3 productsRestrict network access to affected devices.

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 3.17.5read 2026-10-23
  • NVDCVSS 2.07.8read 2026-10-23
  • CNAweakness (CWE)CWE-400read 2026-10-23
  • NVDweakness (CWE)CWE-400read 2026-10-23
  • FIRST EPSSEPSS score1.7 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2020-03-10
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2019-19281?

A vulnerability has been identified in SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V2.5 and < V20.8), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.5 and < V2.8), SIMATIC S7-1500 Software Controller (All versions >= V2.5 and < V20.8). Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a Denial-of-Service condition. The vulnerability can be triggered if specially crafted UDP packets are sent to the device. The security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the device availability.

Is CVE-2019-19281 actively exploited?

Active exploitation of CVE-2019-19281 has not been confirmed. Its EPSS score was 1.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-19281?

CVE-2019-19281 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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