MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 10/09/2026. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| RouterOS | Versions not published yet (product named by CISA KEV) | |
RouterOS contains an argument-handling flaw in the SSH login path involving usernames that begin with a prohibited character, allowing for the trusted RouterOS policy mask to be changed, leading to privilege escalation. Exploitation requires an unauthenticated SSH session to reach the RouterOS login helper.This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free