Loytec LINX firmware: Stack-based Buffer Overflow in cmd_ipaddr_conflict

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55728
StatePUBLISHED
AssignerNCSC.ch
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-24 15:18:30 UTC
Updated2026-07-24 15:18:30 UTC
DescriptionStack-based Buffer Overflow (CWE-121) in `/usr/bin/ltsudo` `cmd_ipaddr_conflict` in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows a `superadmin`-group attacker to trigger a SUID-root process abort or potentially elevate privileges via an overly long interface-name argument.

Risk And Classification

Primary CVSS: v4.0 3.8 LOW from [email protected]

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/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:X

EPSS: 0.001130000 probability, percentile 0.016920000 (date 2026-07-25)

Problem Types: CWE-121 | CWE-121 CWE-121 Stack-based buffer overflow

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary3.8LOWCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/C...
4.0CNACVSS3.8LOWCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/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:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Loytec LIP-ME20xC affected 8.4.16 custom Not specified
CNA Loytec L-INX affected 8.4.16 custom Not specified
CNA Loytec L-GATE affected 8.4.16 custom Not specified
CNA Loytec L-ROC affected 8.4.16 custom Not specified
CNA Loytec L-IOB affected 8.4.16 custom Not specified
CNA Loytec L-DALI affected 8.4.16 custom Not specified
CNA Loytec L-VIS affected 8.4.16 custom Not specified
CNA Loytec L-PAD affected 8.4.16 custom Not specified

References

ReferenceSourceLinkTags
www.loytec.com/support/product-security/advisories/8523-dibt-cve-20260526-00... [email protected] www.loytec.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Daniel Hulliger, armasuisse CYD Campus (en)

CNA: Damian Pfammatter, armasuisse CYD Campus (en)

Additional Advisory Data

Solutions

CNA: Upgrade to firmware version 8.4.18.

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