CVE-2026-67277
Actively exploited. CVE-2026-67277 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-09-10) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-67277 MikroTik RouterOS Missing Authentication for Critical Function Vulnerability CVE-2026-86060 MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities . CISA will continue to add vulnerabilities to the catalog that meet the specified criteria . Aware of an exploited vulnerability not currently listed in the KEV Catalog? Submit it for potential addition through CISA’s KEV Nomination Form . Potential KEV additions must have a CVE ID, evidence of exploitation, and clear mitigation guidance.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 56% of all EPSS-scored CVEs.
Advisory coverage (7)
- unknownexploitedMikrotik security advisory (AV26-887) – Update 1cccs · 2026-09-11
- criticalexploited[UPDATE] [kritisch] MikroTik RouterOS: Mehrere Schwachstellencert-bund · 2026-09-11
- criticalexploitedAL26-020 - Vulnerabilities Impacting MikroTik RouterOS - CVE-2026-67276, CVE-2026-67277 and CVE-2026-86060cccs · 2026-09-10
- criticalexploitedCISA Adds Two Known Exploited Vulnerabilities to Catalogcisa · 2026-09-10
- criticalexploitedCVE-2026-67277: MikroTik RouterOS Missing Authentication for Critical Function Vulnerabilitycisa-kev · 2026-09-10
- unknownexploitedNCSC-2026-0345 [1.00] [M/H] Kwetsbaarheden verholpen in MikroTik RouterOSncsc-nl · 2026-09-08
- highexploitedCVE-2026-67277: RouterOS accepts a "related" btest connection before the corresponding primary session has com…nvd · 2026-09-05
External references
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