CVE-2026-54801Network attack vector

Privilege escalation via insufficient credential validation

Published Jul 9, 2026 · Updated Jul 9, 2026

Unverified password changes in Siemens CPCI85 before 26.20 and SICORE before 26.20.0 allow remote authenticated users to gain elevated privileges. The web API inadequately validates authentication credentials while modifying administrative accounts, permitting password-change controls to be bypassed. Network access and an existing high-privileged account are required; exploitation grants unauthorized control over affected devices.

CVSS severity8.6
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unverified password changes in Siemens CPCI85 before 26.20 and SICORE before 26.20.0 allow remote authenticated users to gain elevated privileges. The web API inadequately validates authentication credentials while modifying administrative accounts, permitting password-change controls to be bypassed. Network access and an existing high-privileged account are required; exploitation grants unauthorized control over affected devices.

The record

CVE
CVE-2026-54801
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
Siemens
Product
SICORE Base system
Classifications
CWE-620, T1098
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <V26.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Siemens · SICORE Base systemversion=0 <V26.20.0
Siemens · CPCI85 Central Processing/Communicationversion=0 <V26.20

Published CVSS scores

7.2Siemens ProductCERTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.6Siemens ProductCERTCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-620Unverified Password Change
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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