--- title: "CVE-2026-86060: SSH session privilege manipulation… | CubePath" description: "RouterOS contains an argument-handling flaw in the SSH login path involving usernames that begin with a prohibited character, allowing for the trusted…" language: en source: https://cubepath.com/security/cve/CVE-2026-86060 --- # CVE-2026-86060: SSH session privilege manipulation… | CubePath ## Description 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) Official description from the CVE record, published by CERT-PL. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-86060) ## Key data ### CVSS 4.0 Critical 9.2 Score published by CERT-PL in the CVE record. CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | Metric | Value | What it means | | ----------------------------------- | ------- | --------------------------------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No measurable action is needed to get around the system's built-in security controls. The attack is repeatable. | | Attack requirements | Present | The attack depends on certain deployment or execution conditions being present. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Vulnerable system: confidentiality | High | Serious or total effect on the secrecy of data. | | Vulnerable system: integrity | High | Serious or total effect on the trustworthiness of data. | | Vulnerable system: availability | High | Serious or total effect on availability. | | Subsequent systems: confidentiality | None | No effect on other systems' data secrecy. | | Subsequent systems: integrity | None | No effect on other systems' data trustworthiness. | | Subsequent systems: availability | None | No effect on other systems' availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.06392 (6.4% probability) Percentile 93.7% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability Added to the catalog Sep 10, 2026 Federal due date Sep 13, 2026 ### CISA assessment as of Sep 8, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable yes Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-88](https://cwe.mitre.org/data/definitions/88.html) Improper Neutralization of Argument Delimiters in a Command ## Affected products Products listed in the CVE record, as the CNA published them. - Mikrotik RouterOS - affected: 7.24 up to before 7.24.2 - affected: 7.0.0 up to before 7.23.4 - affected: 6.0.0 up to before 6.49.21 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [cert.pl/en/posts/2026/09/mikrotik-routeros-cve](https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve) third-party-advisory - [cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-router…](https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/) technical-description - [npratley.net/reversing-mikrotiks-silent-patch-the-routeros-…](https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/) exploit - [mikrotik.com/supportsec/september-2026-vulnerability](https://mikrotik.com/supportsec/september-2026-vulnerability/) vendor-advisory - [forum.mikrotik.com/t/6-49-21-long-term-is-released/272802](https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802) release-notes - [forum.mikrotik.com/t/7-23-4-long-term-is-released/272801](https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801) release-notes - [forum.mikrotik.com/t/7-24-2-stable-is-released/272800](https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800) release-notes ## Timeline 1. ID reserved Sep 4, 2026 2. Record published Sep 5, 2026 3. Added to CISA KEV Sep 10, 2026 4. Record last updated Sep 11, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:06 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)