Loytec LIP-ME20xC up to 8.4.16 /usr/bin/ltsudo cmd_ipaddr_conflict interface-name stack-based overflow

Summaryinfo

A vulnerability, which was classified as very critical, was found in Loytec LIP-ME20xC, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD up to 8.4.16. The affected element is the function cmd_ipaddr_conflict of the file /usr/bin/ltsudo. Such manipulation of the argument interface-name leads to stack-based overflow. This vulnerability is documented as CVE-2026-55728. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Loytec LIP-ME20xC, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD up to 8.4.16. Affected by this issue is the function cmd_ipaddr_conflict of the file /usr/bin/ltsudo. The manipulation of the argument interface-name with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at loytec.com. This vulnerability is handled as CVE-2026-55728 since 06/17/2026. The exploitation is known to be easy. The attack may be launched remotely. The exploitation needs additional levels of successful authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/24/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Loytec

Name

• L-DALI
• L-GATE
• L-INX
• L-IOB
• L-PAD
• L-ROC
• L-VIS
• LIP-ME20xC

Version

• 8.4.0
• 8.4.1
• 8.4.2
• 8.4.3
• 8.4.4
• 8.4.5
• 8.4.6
• 8.4.7
• 8.4.8
• 8.4.9
• 8.4.10
• 8.4.11
• 8.4.12
• 8.4.13
• 8.4.14
• 8.4.15
• 8.4.16

CPE 2.3info

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CPE 2.2info

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Entryinfo

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