[UPDATE] [kritisch] MikroTik RouterOS: Mehrere Schwachstellen
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in MikroTik RouterOS ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, um einen Denial of Service Zustand herbeizuführen und um die Kontrolle über betroffene Geräte zu übernehmen.
Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3193
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-672760.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
- Exploitation confirmedCVE-2026-67277Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 56% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-672780.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-672790.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-672810.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.
- Exploitation confirmedCVE-2026-86060Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 61% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-67276 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-67277 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-67278 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-67279 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-67281 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-86060 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownexploitedMikrotik security advisory (AV26-887) – Update 1cccs
- criticalexploitedAL26-020 - Vulnerabilities Impacting MikroTik RouterOS - CVE-2026-67276, CVE-2026-67277 and CVE-2026-86060cccs
- criticalexploitedCISA Adds Two Known Exploited Vulnerabilities to Catalogcisa
- criticalexploitedCVE-2026-86060: MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerabilitycisa-kev
- criticalexploitedCVE-2026-67277: MikroTik RouterOS Missing Authentication for Critical Function Vulnerabilitycisa-kev
- unknownexploitedNCSC-2026-0345 [1.00] [M/H] Kwetsbaarheden verholpen in MikroTik RouterOSncsc-nl
- criticalexploitedCVE-2026-86060: RouterOS contains an argument-handling flaw in the SSH login path involving usernames that beg…nvd
- unknownCVE-2026-67281: RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where…nvd
- unknownCVE-2026-67279: RouterOS SSH enters the connection protocol after a client-requested rekey even though user au…nvd
- unknownCVE-2026-67278: MikroTik RouterOS accepts malformed RSA/PKCS#1 v1.5 signatures during X.509 validation. Becaus…nvd
- highexploitedCVE-2026-67277: RouterOS accepts a "related" btest connection before the corresponding primary session has com…nvd
- unknownCVE-2026-67276: RouterOS does not compare the complete RSA public key when matching an SSH authentication requ…nvd
Recent advisories for MikroTik RouterOS
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- criticalexploitedAL26-020 - Vulnerabilities Impacting MikroTik RouterOS - CVE-2026-67276, CVE-2026-67277 and CVE-2026-86060cccs · 2026-09-10
- criticalexploitedCVE-2026-67277: MikroTik RouterOS Missing Authentication for Critical Function Vulnerabilitycisa-kev · 2026-09-10
- criticalexploitedCVE-2026-86060: MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerabilitycisa-kev · 2026-09-10
- unknownexploitedNCSC-2026-0345 [1.00] [M/H] Kwetsbaarheden verholpen in MikroTik RouterOSncsc-nl · 2026-09-08
- unknownCVE-2026-67278: MikroTik RouterOS accepts malformed RSA/PKCS#1 v1.5 signatures during X.509 validation. Becaus…nvd · 2026-09-05
- mediumCVE-2026-14227: An API session‑management flaw in products with the MikroTik RouterOS API enabled are vulnerab…nvd · 2026-07-30
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