CVE-2026-8047

highpriority · track · 0EPSS 0.006 · 47 %ileDEEU
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.57% (47th) EPSS
CVSS 7.5 · high
Is it mine?
52 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · cert_bund · codesys_psirt

EPSS · scored 2026-10-22

The affected products perform improper length checking when parsing incoming HTTP requests, resulting in a size-limited out-of-bounds write. An unauthenticated remote attacker can exploit this flaw to cause a denial of service via a system crash on the affected device.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedcodesys_psirt

    Update the following products to version 3.5.22.20. * CODESYS Control RTE (SL) * CODESYS Control RTE (for Beckhoff CX) SL * CODESYS Control Win (SL) * CODESYS HMI (SL) * CODESYS Runtime Toolkit The CODESYS Development System and the products available as CODESYS add-ons can be downloaded and installed directly with the CODESYS Installer or be downloaded from the CODESYS Store. Alternatively, as well as for all other products, you will find further information on obtaining the software update in the CODESYS Update area https://www.codesys.com/download/.

02

cvss

Technical severity, 0–10. One row per scoring source.

8.7
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · info@cert.vde.comexploitability 3.9 · impact 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CODESYS PSIRT
v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU
v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · info@cert.vde.com
v4.06.6mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1284USCWE-1284US
05

affected products (52)

Products and version ranges known to be affected.

showing 20 of 52
06

advisories (2)

Vendor and ecosystem advisories describing this.

  • Advisory2026-10_VDE-2026-057CODESYS Control - Out-of-bounds Write2026-05-26csaf · codesys_psirtDE

    The CmpWebServer component in the CODESYS Control Runtime allows users to create browser-based visualizations for monitoring and controlling industrial processes. Due to improper bounds checking, a specially crafted HTTP request from an unauthenticated remote attacker may lead to a size-limited out-of-bounds write, causing a denial of service of the affected device. The CODESYS Control runtime system is only affected if the web server is active, which by default requires a running application with an enabled Web Visualization.

  • WID-SEC-W-2026-1675CODESYS: Mehrere SchwachstellenDeutsch2026-05-25csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in CODESYS ausnutzen, um seine Privilegien zu erhöhen, um Daten zu manipulieren, und um einen Denial of Service Angriff durchzuführen.

07

also known as (3)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcert_bundcodesys_psirtNVDCVE.orgMITRE
published 2026-05-26modified 2026-07-23
09

references (4)

External citations — patches, advisories, analysis.

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