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CVE-2026-86060

SSH session privilege manipulation via a crafted username in Mikrotik RouterOS

CVSS 4.0 9.2 CRITICALCheck source for fixed versionsCISA KEV

Original advisory

cve-program · CVE-2026-86060

Published

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)

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86060

Published

RouterOS

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Mikrotik",
                    "product": "RouterOS",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "7.24",
                            "lessThan": "7.24.2",
                            "versionType": "custom"
                        },
                        {
                            "status": "affected",
                            "version": "7.0.0",
                            "lessThan": "7.23.4",
                            "versionType": "custom"
                        },
                        {
                            "status": "affected",
                            "version": "6.0.0",
                            "lessThan": "6.49.21",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON