Loading vulnerability…
CVE-2026-67277 is a missing-authentication vulnerability in MikroTik RouterOS bandwidth-test (btest) connection handling. RouterOS accepts a related btest connection before its corresponding primary session has completed authentication, allowing an unauthenticated network client to start an IPv4 UDP test. When the test is configured with random-data=false, the sender can transmit an uninitialized tail of a kernel packet buffer. Separately, inverted and unchecked packet-size interval validation permits unsigned integer underflow, producing abnormally large fragmented output and potentially restarting the RouterOS kernel.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity RouterOS bandwidth-test service vulnerability that permits unauthenticated access to a state intended for authenticated users. Combined with additional memory-handling issues, it can disclose kernel memory or cause device restarts.
A high-severity MikroTik RouterOS bandwidth-test vulnerability that can disclose kernel memory or remotely crash a system.
RouterOS bandwidth-test service flaw that may enable memory disclosure or denial of service through router reboot.
A high-severity MikroTik RouterOS btest authentication flaw that permits unauthenticated IPv4 UDP testing before primary-session authentication, exposing uninitialized kernel-buffer data and enabling malformed fragmented output that can restart the RouterOS kernel.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.