CVE-2026-79679

highpriority · track · 0EPSS 0.003 · 28 %ileCH
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.34% (28th) EPSS
CVSS 8.7 · high
Is it mine?
2 products
Check your exposure
Who says so?
1 sources
abb_psirt

EPSS · scored 2026-10-26

Use of Weak Credentials vulnerability in B&R Industrial Automation GmbH mapp Audit used in mapp Services. This issue affects mapp Audit used in mapp Services: before 6.8.0.

01

remediations

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

A vendor fix is available.

  • FixedB&R Industrial Automation GmbH mapp Audit installed with mapp Services <6.8.0abb_psirt

    The problem is corrected in the following product versions: mapp Services >= 6.8.0 B&R recommends that customers apply the update at earliest convenience when the vulnerable functionality mapp Audit is used. The process to install updates is described in the user manual. The step to identify the installed product version is described in the user manual.

  • MitigationB&R Industrial Automation GmbH mapp Audit installed with mapp Services <6.8.0abb_psirt

    The exposure is limited to systems that actively use the mapp Audit functionality. Projects that only include mapp Services, but do not configure or use mapp Audit, are not affected. The risk can be further reduced by restricting network access to the affected OPC UA server, for example by limiting access to trusted engineering stations, runtime components, or dedicated automation network segments using the Automation Runtime host-based firewall. Refer to section “General security recommendations” for further advise on how to keep your system secure.

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 · low–high · 2.7–8.7

v3.18.7highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:Nsecondary · cybersecurity@ch.abb.comexploitability 2.2 · impact 5.8
v3.18.7highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:Osecondary · ABB PSIRT
v4.07highCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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 · cybersecurity@ch.abb.com
v4.02.7lowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1391USprimaryCWE-1391US
05

affected products (2)

Products and version ranges known to be affected.

06

advisories (1)

Vendor and ecosystem advisories describing this.

  • SA26P012mapp Services Use of Weak Authenticators in mapp Audit2026-09-03csaf · abb_psirtCH

    An update is available that resolves a vulnerability in the product versions listed as affected in the advisory. An attacker who successfully exploits this vulnerability could gain access to the OPC UA server component on affected devices due to insufficient entropy of authenticators used by mapp Audit.

07

sources

Which sources assert this record, and when.

abb_psirtNVDCVE.orgMITRE
published 2026-09-03modified 2026-09-03
09

references (1) nvd

External citations — patches, advisories, analysis.

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