CVE-2026-67277
Missing Authentication for Critical Function in MikroTik RouterOS. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 10 September 2026.
- Product
- MikroTik RouterOS
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- No known use in ransomware campaigns
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s description.
MikroTik RouterOS contains a missing authentication for critical function vulnerability which allows kernel memory disclosure and denial of service in the btest service.
More from MikroTik this year.
- CVE-2026-67279 Improper Enforcement of Behavioral Workflow, added
- CVE-2026-86060 Improper Neutralization of Argument Delimiters in a Command, added
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 4 November 2026.