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    "cveMetadata": {
        "cveId": "CVE-2026-12503",
        "assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c",
        "state": "PUBLISHED",
        "assignerShortName": "NCSC.ch",
        "dateReserved": "2026-06-17T09:48:11.206Z",
        "datePublished": "2026-07-24T13:57:56.691Z",
        "dateUpdated": "2026-07-24T14:57:47.202Z"
    },
    "containers": {
        "cna": {
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                "orgId": "455daabc-a392-441d-aa46-37d35189897c",
                "shortName": "NCSC.ch",
                "dateUpdated": "2026-07-24T13:57:56.691Z"
            },
            "title": "Loytec LINX firmware: Improper Link Resolution in /usr/bin/larm_starter",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-59",
                            "description": "CWE-59 Improper link resolution before file access ('link following')",
                            "type": "CWE"
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                    ]
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            "impacts": [
                {
                    "capecId": "CAPEC-122",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-122 Privilege Abuse"
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                {
                    "capecId": "CAPEC-233",
                    "descriptions": [
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                            "lang": "en",
                            "value": "CAPEC-233 Privilege Escalation"
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                    ]
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            "affected": [
                {
                    "vendor": "Loytec",
                    "product": "LIP-ME20xC",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "8.4.16",
                            "versionType": "custom"
                        }
                    ],
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                {
                    "vendor": "Loytec",
                    "product": "L-INX",
                    "versions": [
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                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "8.4.16",
                            "versionType": "custom"
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                    ],
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                {
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                    "product": "L-GATE",
                    "versions": [
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                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "8.4.16",
                            "versionType": "custom"
                        }
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                {
                    "vendor": "Loytec",
                    "product": "L-ROC",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "8.4.16",
                            "versionType": "custom"
                        }
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                    "product": "L-IOB",
                    "versions": [
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                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "8.4.16",
                            "versionType": "custom"
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                    "product": "L-DALI",
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                            "status": "affected",
                            "version": "0",
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                            "versionType": "custom"
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                    "product": "L-VIS",
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                        {
                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "8.4.16",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                },
                {
                    "vendor": "Loytec",
                    "product": "L-PAD",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "8.4.16",
                            "versionType": "custom"
                        }
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            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Improper Link Resolution (CWE-59) in `/usr/bin/larm_starter` in Loytec L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows an authenticated `larmapp` attacker to make `/etc/passwd` writable by the `larmapp` group (leading to root privilege escalation) via a symlink attack on `/etc/lighttpd/ssl/server.pem`.",
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                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://www.loytec.com/support/product-security/advisories/8520-dibt-cve-20260526-0002-symlink-following-in-chown-chmod-critical",
                    "tags": [
                        "vendor-advisory"
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                }
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                            "lang": "en",
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                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "HIGH",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
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                        "baseScore": 9.2,
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            "solutions": [
                {
                    "lang": "en",
                    "value": "Upgrade to firmware 8.4.18.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "Upgrade to firmware 8.4.18."
                        }
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            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Daniel Hulliger, armasuisse CYD Campus",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "Damian Pfammatter, armasuisse CYD Campus",
                    "type": "finder"
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            ],
            "source": {
                "discovery": "EXTERNAL"
            },
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        "adp": [
            {
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                    {
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                                "timestamp": "2026-07-24T14:57:37.633031Z",
                                "id": "CVE-2026-12503",
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                                        "Exploitation": "none"
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                "title": "CISA ADP Vulnrichment",
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