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        "cveId": "CVE-2026-67278",
        "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
        "state": "PUBLISHED",
        "assignerShortName": "CERT-PL",
        "dateReserved": "2026-07-29T11:59:30.538Z",
        "datePublished": "2026-09-05T20:00:57.258Z",
        "dateUpdated": "2026-09-17T14:20:12.715Z"
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                "dateUpdated": "2026-09-17T14:20:12.715Z"
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            "title": "TLS server impersonation possible in Mikrotik RouterOS",
            "datePublic": "2026-09-05T00:00:00.000Z",
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                            "lang": "en",
                            "cweId": "CWE-347",
                            "description": "CWE-347 Improper verification of cryptographic signature",
                            "type": "CWE"
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            "affected": [
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                    "vendor": "Mikrotik",
                    "product": "RouterOS",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "7.24",
                            "lessThan": "7.24.3",
                            "versionType": "custom"
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                        {
                            "status": "affected",
                            "version": "7.0.0",
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                                    "versionEndExcluding": "7.24.3"
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                    "value": "MikroTik RouterOS accepts malformed RSA/PKCS#1 v1.5 signatures across RSA-based services, including TLS/X.509 certificate validation and SSH host-key authentication. Because its trust store includes an e=3 root CA, an attacker controlling or redirecting an outbound RouterOS TLS connection can use the root’s public certificate - without its private key - to forge a trusted intermediate and issue certificates for arbitrary hostnames, enabling TLS server impersonation. The same permissive verification also undermines RSA-based SSH authentication.\n\n\n\nThis issue affects only 7.x branch was fixed in versions: 7.23.6 (Long-term) and 7.24.3 (Stable).\nReleases 7.23.4 and 7.24.2 included an incomplete fix.",
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            "references": [
                {
                    "url": "https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve",
                    "tags": [
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                    ]
                },
                {
                    "url": "https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/",
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                        "technical-description"
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                },
                {
                    "url": "https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/",
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                    "url": "https://mikrotik.com/supportsec/september-2026-vulnerability/",
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                {
                    "url": "https://forum.mikrotik.com/t/7-23-6-long-term-is-released/273139",
                    "tags": [
                        "release-notes"
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                },
                {
                    "url": "https://forum.mikrotik.com/t/7-24-3-stable-is-released/273138",
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                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
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                        "vulnAvailabilityImpact": "NONE",
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                        "Automatable": "NOT_DEFINED",
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                                "timestamp": "2026-09-08T15:30:45.430794Z",
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