Exploitation evidence
Known exploited · CISA KEV listed
Added 2026-09-25. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA due date: 2026-09-28. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Mikrotik / RouterOS
Default status: unaffected
- affected: 7.24 to < 7.24.2 (custom)
- affected: 7.0.0 to < 7.23.4 (custom)
- affected: 6.0.0 to < 6.49.21 (custom)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve
- https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/
- https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/
- https://mikrotik.com/supportsec/september-2026-vulnerability/
- https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802
- https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801
- https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800
- https://bishopfox.com/blog/mikrotrick-inside-the-routeros-takeover-chain
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-67279
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.02277,
"percentile": 0.83367
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.02277,
"percentile": 0.8326
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.02277,
"percentile": 0.8324
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.02277,
"percentile": 0.83231
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.02277,
"percentile": 0.8322
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.02277,
"percentile": 0.83195
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.02277,
"percentile": 0.83181
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.02277,
"percentile": 0.83166
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.02277,
"percentile": 0.83134
}03 Nov 2026, 06:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
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"id": "CVE-2026-67279",
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"timestamp": "2026-09-25T00:00:00+00:00",
"version": "2.0.3"
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"url": "https://bishopfox.com/blog/mikrotrick-inside-the-routeros-takeover-chain"
},
{
"tags": [
"government-resource"
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"timeline": [
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"time": "2026-09-25T00:00:00.000Z",
"value": "CVE-2026-67279 added to CISA KEV"
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"title": "CISA ADP Vulnrichment"
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"cna": {
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"product": "RouterOS",
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{
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{
"lessThan": "6.49.21",
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"cpeApplicability": [
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"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>"
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}
],
"metrics": [
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"Recovery": "NOT_DEFINED",
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"attackVector": "NETWORK",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"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",
"version": "4.0",
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"vulnConfidentialityImpact": "LOW",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
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"problemTypes": [
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"description": "CWE-841 Improper enforcement of behavioral workflow",
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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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"vendor-advisory"
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"url": "https://mikrotik.com/supportsec/september-2026-vulnerability/"
},
{
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"release-notes"
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"url": "https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802"
},
{
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"url": "https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801"
},
{
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"url": "https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800"
}
],
"source": {
"discovery": "INTERNAL"
},
"title": "SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS",
"x_generator": {
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"cveMetadata": {
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"assignerShortName": "CERT-PL",
"cveId": "CVE-2026-67279",
"datePublished": "2026-09-05T20:00:57.894Z",
"dateReserved": "2026-07-29T11:59:30.538Z",
"dateUpdated": "2026-09-26T03:55:45.145Z",
"state": "PUBLISHED"
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"dataVersion": "5.2"
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.02277,
"percentile": 0.83113
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2026-67279",
"cwes": [
"CWE-841"
],
"dateAdded": "2026-09-25",
"dueDate": "2026-09-28",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://mikrotik.com/supportsec/september-2026-vulnerability ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-67279",
"product": "RouterOS",
"requiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
"shortDescription": "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.",
"vendorProject": "MikroTik",
"vulnerabilityName": "Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability"
}