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Pepperl+Fuchs ICE IO-Link Master CVE-2026-27553

| EUVDEUVD-2026-80236 MEDIUM
Exposure of Sensitive System Information to an Unauthorized Control Sphere (CWE-497)
2026-09-16 CERTVDE GHSA-8vhg-m252-v9wj
PHP Information Disclosure Ice2 8Iol1 G65L V1D Ice2 8Iol G65L V1D Ice2 8Iol K45P Rj45 Ice2 8Iol K45S Rj45 Ice3 8Iol1 G65L V1D Ice3 8Iol G65L V1D Ice3 8Iol G65L V1D Y Ice3 8Iol K45P Rj45 Ice3 8Iol K45S Rj45 Iol Ma8 Pn Di8 Iol Ma8 Eip Di8 Yl212Cei8M1Io Yn115Cei8Rpio Yl212Cpn8M1Io Yn115Cpn8Rpio
6.5
CVSS 3.1 · NVD
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Severity by source

Vendor (CERTVDE) PRIMARY
MEDIUM
qualitative
NVD
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
6.5 MEDIUM

Network-reachable PHP endpoint, low complexity, requires only a valid low-privilege session; confidentiality-only impact (password hashes), no integrity or availability effect.

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

Primary rating from Vendor (CERTVDE).

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch available
Sep 16, 2026 - 09:16 EUVD
Analysis Generated
Sep 16, 2026 - 08:30 vuln.today

DescriptionNVD

A low-privileged remote attacker can manipulate the schema path parameter in the /index.php/diagnostics_tab/ajax_diag_table_rows endpoint using a valid user cookie allowing disclosure of all user password hashes.

AnalysisAI

Password hash disclosure in Pepperl+Fuchs ICE2/ICE3 IO-Link Master devices and Phoenix Contact IOL MA8 PN DI8 (plus OEM variants) exposes all user credential hashes to any authenticated low-privileged user. The PHP-based diagnostics endpoint /index.php/diagnostics_tab/ajax_diag_table_rows accepts a manipulable schema path parameter that, when tampered with using a valid session cookie, causes the server to return the device's full user credential hash store. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires possession of a valid low-privileged user session cookie for the device web management interface (PR:L per CVSS), meaning the attacker must first obtain credentials for any device account - including the lowest-privilege user role. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) is appropriately calibrated: network-reachable, no interaction required, low complexity - but gated by the requirement for a valid low-privileged session cookie (PR:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Consult the three CERTVDE advisories (VDE-2026-014 for Pepperl+Fuchs ICE2/ICE3, VDE-2026-027 and VDE-2026-028 for Phoenix Contact and OEM variants) for vendor-specific patched firmware versions; no specific fix version was extractable from the NVD data at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-27553 vulnerability details – vuln.today
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