No exploitation reportedFix available

CVE-2019-13548

Q: Is CVE-2019-13548 actively exploited?

Active exploitation of CVE-2019-13548 has not been confirmed. Its EPSS score was 5.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-13548?

CVE-2019-13548 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2019-09-13
Fixed in3.5.14.10 · 3.5.12.80
WeaknessCWE-121 · CWE-787

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

CODESYS V3 web server, all versions prior to 3.5.14.10, allows an attacker to send specially crafted http or https requests which could cause a stack overflow and create a denial-of-service condition or allow remote code execution.

Timeline

dates in UTC

2019-09-1317:15CVE 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-2019-13548?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-13548?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Codesys control rte

Branch	Affected	Fixed in	Source
3.5	≥ 3.5.13.0, < 3.5.14.10	3.5.14.10	NVD
3.5	≥ 3.5.8.60, < 3.5.12.80	3.5.12.80	NVD

Codesys control win

Branch	Affected	Fixed in	Source
3.5	≥ 3.5.13.0, < 3.5.14.10	3.5.14.10	NVD
3.5	≥ 3.5.9.80, ≤ 3.5.12.80	no fix published	NVD

Codesys hmi

Branch	Affected	Fixed in	Source
3.5	≥ 3.5.13.0, < 3.5.14.10	3.5.14.10	NVD
3.5	≥ 3.5.10.0, < 3.5.12.80	3.5.12.80	NVD

10 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-19-255-01 CISA14 known affected
3S-Smart Software Solutions GmbH CODESYS V3 Web Server
CODESYS Control RTE V3 (for Beckhoff CX) containing the webserver CmpWebServer: all versions prior to 3.5.14.10 · CODESYS Control for emPC-A/iMX6 containing the webserver CmpWebServer: all versions prior to 3.5.14.10 · CODESYS Control Win V3 (also part of the CODESYS Development System setup) containing the webserver CmpWebServer: all versions prior to 3.5.14.10 · +11 more

Full record on NVD

Fix

Update Codesys control rte to 3.5.14.10 · 3.5.12.80
Mitigation from the vendor CISA ICSA-19-255-01 · 14 products3S-Smart Software Solutions GmbH has released Versions 3.5.12.80, 3.5.14.10, and 3.5.15.0 to resolve the vulnerabilities for the affected CODESYS products.
Mitigation from the vendor CISA ICSA-19-255-01 · 14 productsPlease visit the CODESYS update page for more information on how to obtain the software update: https://www.codesys.com/download/
Mitigation from the vendor CISA ICSA-19-255-01 · 14 productsUpdating to Version 3.5.14.10 or higher is recommended over Version 3.5.12.80, which does not resolve the vulnerabilities for all affected products.
Mitigation from the vendor CISA ICSA-19-255-01 · 14 productsUse controllers and devices only in a protected environment to minimize network exposure and ensure that they are not accessible from outside.
Mitigation from the vendor CISA ICSA-19-255-01 · 14 productsUse firewalls to protect and separate the control system network from other networks.
Mitigation from the vendor CISA ICSA-19-255-01 · 14 productsUse VPN (virtual private networks) tunnels if remote access is required.

Advisories and patches

www.us-cert.govMitigation · Patch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-121read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score5.8 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2019-09-13
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-13548?

Is CVE-2019-13548 actively exploited?

Active exploitation of CVE-2019-13548 has not been confirmed. Its EPSS score was 5.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-13548?

CVE-2019-13548 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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