CVE Details
CVE-2026-67279
Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability
Published: 2026-09-25
CVSS: 6.9 MEDIUM
Product: MikroTik RouterOS
Due Date: 2026-09-28
Mikrotik RouterOS contains an improper enforcement of behavioral workflow vulnerability that could allow an unauthenticated client to open a session channel and send an exec request. This vulnerability can be chained to achieve unauthenticated exploitation of CVE-2026-86060.
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FIRST EPSS
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References
Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-67279 |
| cveMetadata > | assignerOrgId | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | CERT-PL |
| cveMetadata > | dateReserved | 2026-07-29T11:59:30.538Z |
| cveMetadata > | datePublished | 2026-09-05T20:00:57.894Z |
| cveMetadata > | dateUpdated | 2026-09-25T15:41:23.920Z |
| containers > | cna > providerMetadata > orgId | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 |
| containers > | cna > providerMetadata > shortName | CERT-PL |
| containers > | cna > providerMetadata > dateUpdated | 2026-09-05T20:40:29.029Z |
| containers > | cna > title | SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 0 > descriptions > 0 > cweId | CWE-841 |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | CWE-841 Improper enforcement of behavioral workflow |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | cna > affected > 0 > vendor | Mikrotik |
| containers > | cna > affected > 0 > product | RouterOS |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > affected > 0 > versions > 0 > version | 7.24 |
| containers > | cna > affected > 0 > versions > 0 > lessThan | 7.24.2 |
| containers > | cna > affected > 0 > versions > 0 > versionType | custom |
| containers > | cna > affected > 0 > versions > 1 > status | affected |
| containers > | cna > affected > 0 > versions > 1 > version | 7.0.0 |
| containers > | cna > affected > 0 > versions > 1 > lessThan | 7.23.4 |
| containers > | cna > affected > 0 > versions > 1 > versionType | custom |
| containers > | cna > affected > 0 > versions > 2 > status | affected |
| containers > | cna > affected > 0 > versions > 2 > version | 6.0.0 |
| containers > | cna > affected > 0 > versions > 2 > lessThan | 6.49.21 |
| containers > | cna > affected > 0 > versions > 2 > versionType | custom |
| containers > | cna > affected > 0 > defaultStatus | unaffected |
| containers > | cna > cpeApplicability > 0 > operator | OR |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > operator | OR |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > negate | False |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > criteria | cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > versionStartIncluding | 0.0.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > versionEndExcluding | 7.25.1 |
| containers > | cna > descriptions > 0 > lang | en |
| containers > | cna > descriptions > 0 > value | RouterOS SSH enters the connection protocol after a client-requested rekey even though user authentication was never attempted, allowing an unauthenticated client to open a session channel and send an exec request. On affected builds the server dispatches the command, enabling unauthenticated creation, overwrite, and reconstruction of files in the RouterOS managed file namespace, including support files containing configuration and diagnostic data.This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable) |
| containers > | cna > descriptions > 0 > supportingMedia > 0 > type | text/html |
| containers > | cna > descriptions > 0 > supportingMedia > 0 > base64 | False |
| containers > | cna > descriptions > 0 > supportingMedia > 0 > value | RouterOS SSH enters the connection protocol after a client-requested rekey even though user authentication was never attempted, allowing an unauthenticated client to open a session channel and send an exec request. On affected builds the server dispatches the command, enabling unauthenticated creation, overwrite, and reconstruction of files in the RouterOS managed file namespace, including support files containing configuration and diagnostic data.<div>This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)</div> |
| containers > | cna > references > 0 > url | https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve |
| containers > | cna > references > 0 > tags > 0 | third-party-advisory |
| containers > | cna > references > 1 > url | https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/ |
| containers > | cna > references > 1 > tags > 0 | technical-description |
| containers > | cna > references > 2 > url | https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/ |
| containers > | cna > references > 2 > tags > 0 | exploit |
| containers > | cna > references > 3 > url | https://mikrotik.com/supportsec/september-2026-vulnerability/ |
| containers > | cna > references > 3 > tags > 0 | vendor-advisory |
| containers > | cna > references > 4 > url | https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802 |
| containers > | cna > references > 4 > tags > 0 | release-notes |
| containers > | cna > references > 5 > url | https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801 |
| containers > | cna > references > 5 > tags > 0 | release-notes |
| containers > | cna > references > 6 > url | https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800 |
| containers > | cna > references > 6 > tags > 0 | release-notes |
| containers > | cna > metrics > 0 > format | CVSS |
| containers > | cna > metrics > 0 > scenarios > 0 > lang | en |
| containers > | cna > metrics > 0 > scenarios > 0 > value | GENERAL |
| containers > | cna > metrics > 0 > cvssV4_0 > attackVector | NETWORK |
| containers > | cna > metrics > 0 > cvssV4_0 > attackComplexity | LOW |
| containers > | cna > metrics > 0 > cvssV4_0 > attackRequirements | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > privilegesRequired | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > userInteraction | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnConfidentialityImpact | LOW |
| containers > | cna > metrics > 0 > cvssV4_0 > subConfidentialityImpact | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnIntegrityImpact | LOW |
| containers > | cna > metrics > 0 > cvssV4_0 > subIntegrityImpact | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnAvailabilityImpact | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > subAvailabilityImpact | NONE |
| containers > | cna > metrics > 0 > cvssV4_0 > exploitMaturity | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > Safety | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > Automatable | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > Recovery | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > valueDensity | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > vulnerabilityResponseEffort | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > providerUrgency | NOT_DEFINED |
| containers > | cna > metrics > 0 > cvssV4_0 > version | 4.0 |
| containers > | cna > metrics > 0 > cvssV4_0 > baseSeverity | MEDIUM |
| containers > | cna > metrics > 0 > cvssV4_0 > baseScore | 6.9 |
| containers > | cna > metrics > 0 > cvssV4_0 > vectorString | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |
| containers > | cna > credits > 0 > lang | en |
| containers > | cna > credits > 0 > value | Sławomir Rozbicki (CERT.PL) |
| containers > | cna > credits > 0 > type | finder |
| containers > | cna > source > discovery | INTERNAL |
| containers > | cna > x_generator > engine | Vulnogram 1.0.3 |
| containers > | adp > 0 > metrics > 0 > other > type | ssvc |
| containers > | adp > 0 > metrics > 0 > other > content > id | CVE-2026-67279 |
| containers > | adp > 0 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation | active |
| containers > | adp > 0 > metrics > 0 > other > content > options > 1 > Automatable | yes |
| containers > | adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact | partial |
| containers > | adp > 0 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 0 > metrics > 0 > other > content > timestamp | 2026-09-25T15:40:04.256445Z |
| containers > | adp > 0 > references > 0 > url | https://bishopfox.com/blog/mikrotrick-inside-the-routeros-takeover-chain |
| containers > | adp > 0 > references > 0 > tags > 0 | third-party-advisory |
| containers > | adp > 0 > references > 1 > url | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-67279 |
| containers > | adp > 0 > references > 1 > tags > 0 | government-resource |
| containers > | adp > 0 > title | CISA ADP Vulnrichment |
| containers > | adp > 0 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 0 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2026-09-25T15:41:23.920Z |