CVE-2026-55728: Loytec LINX firmware: Stack-based Buffer Overflow in cmd_ipaddr_conflict

Severity: low (CVSS 3.8 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-24 · updated 2026-07-27
Weakness: CWE-121

Description

Stack-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.

Affected products

Loytec L-DALI: through 8.4.16
Loytec L-GATE: through 8.4.16
Loytec L-INX: through 8.4.16
Loytec L-IOB: through 8.4.16
Loytec L-PAD: through 8.4.16
Loytec L-ROC: through 8.4.16
Loytec L-VIS: through 8.4.16
Loytec LIP-ME20xC: through 8.4.16

References

https://www.loytec.com/support/product-security/advisories/8523-dibt-cve-20260526-0005-stack-buffer-overflow-in-cmd_ipaddr_conflict-low

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