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CVE-2026-86060 (GCVE-0-2026-86060)

Vulnerability from cvelistv5 – Published: 2026-09-05 20:00 – Updated: 2026-09-05 20:41
VLAI ENISA
Title
SSH session privilege manipulation via a crafted username in Mikrotik RouterOS
Summary
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)
Severity
9.2 (Critical)
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
CWE
  • CWE-88 - Improper neutralization of argument delimiters in a command ('argument injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
Mikrotik RouterOS Affected: 7.24 , < 7.24.2 (custom)
Affected: 7.0.0 , < 7.23.4 (custom)
Affected: 6.0.0 , < 6.49.21 (custom)
    cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:*
    cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:*
    cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Sławomir Rozbicki (CERT.PL)
ENISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 4dad5054-27d2-428b-8fc0-829ceb08f56b

Vulnerability ID: CVE-2026-86060

Status: Confirmed

Status Updated: 2026-09-05 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-09-05
Asserted: 2026-09-05
Scope
Notes: MikroTrick | Affected: MikroTik / RouterOS | 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) | Patched since: 2026/09/03 | Exploitation type: unknown | CWEs: CWE-88 | Origin source: CERT.PL | Notes: https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/
Evidence

Type: Csirt Report

Signal: Successful Exploitation

Confidence: 75%

Source: enisa-cnw-kev

Details
Cwes CWE-88
Euvd EUVD-2026-72029
Notes https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/
Catalog ENISA / EU CSIRTs Network (CNW) KEV JSON
Product RouterOS
Datereported 2026/09/05
Originsource CERT.PL
Patchedsince 2026/09/03
Vendorproject MikroTik
Exploitationtype unknown
Vulnerabilityname MikroTrick
Threatactorsexploiting
References
Created: 2026-09-05 22:00 UTC | Updated: 2026-09-05 22:00 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.