CVE-2026-78319

criticalpriority · track · 0EPSS 0.006 · 49 %ileCH
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.61% (49th) EPSS
CVSS 9.8 · critical
Is it mine?
10 products
Check your exposure
Who says so?
1 sources
sauter_psirt

EPSS · scored 2026-10-27

A service running on the affected products contains a potential Time-of-Check Time-of-Use (TOCTOU) race condition. An unauthenticated remote attacker could exploit this race condition to bypass intended security controls. This may result in the execution of unauthorized code.

01

remediations

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

A vendor fix is available.

  • FixedEY-modulo 5 embedded software version <7.0.0 installed on EY-modulo 5 ecos504sauter_psirt

    Update EY-modulo 5 affected products with Firmware Version 7.0.0 or higher and enable the downgrade protection.

  • FixedEY-modulo 5 embedded software version <7.0.0 installed on EY-modulo 5 ecos505sauter_psirt

    Update EY-modulo 5 affected products with Firmware Version 7.0.0 or higher and enable the downgrade protection.

  • Fixedmodulo 6 embedded software version <4.0.0 installed on modulo 6 modu612-LCsauter_psirt

    Update modulo 6 affected products with Firmware Version 4.0.0 or higher and enable the downgrade protection.

  • Fixedmodulo 6 embedded software version <4.0.0 installed on modulo 6 modu660-ASsauter_psirt

    Update modulo 6 affected products with Firmware Version 4.0.0 or higher and enable the downgrade protection.

  • Fixedmodulo 6 embedded software version <4.0.0 installed on modulo 6 modu680-ASsauter_psirt

    Update modulo 6 affected products with Firmware Version 4.0.0 or higher and enable the downgrade protection.

  • Mitigationsauter_psirt

    Protect access to device and network according to best practices and state of the art means.

02

cvss

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

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.1–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Sauter PSIRT
v4.09.3criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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
v4.08.1highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-367USCWE-367US
05

affected products (10)

Products and version ranges known to be affected.

06

advisories (1)

Vendor and ecosystem advisories describing this.

  • VDE-2026-093SAUTER: modulo 6 and EY-modulo 5 Vulnerability in Firmware update mechanism allowing remote code execution2026-09-01csaf · sauter_psirtCH

    A vulnerability has been found in the firmware update process of SAUTER Building Controllers. The identified vulnerability could allow unauthorized code execution on affected controllers.

07

sources

Which sources assert this record, and when.

sauter_psirtNVDCVE.orgMITRE
published 2026-09-01modified 2026-09-03
08

references (2) nvd

External citations — patches, advisories, analysis.

scry

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