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CVE-2026-86060

CRITICAL 9.2 KNOWN EXPLOITED PoC CATALOGUED ALL-YEARS

Published 2026-09-05 · Last modified 2026-09-11 · CERT-PL · NVD: Analyzed

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)

ACTIVELY EXPLOITED

Confirmed exploited in the wild — in CISA KEV since 2026-09-10. Patch or mitigate now.

Exploitation likelihood

6.4%chance of exploitation in 30 days · 94th percentile

● In CISA KEV (2026-09-10)● Catalogued PoC◆ SSVC: exploitation active, automatable yes

Impact if exploited

9.2CVSS 4.0 · CRITICAL · CNA

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ⚠Requirements: Specific conditions must be present

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

Public PoC or exploit resources are catalogued below.

Listed by the named source; Vulnpedia has not tested these resources.

PoC data: JSON

Resource commands

searchsploit --cve CVE-2026-86060 && searchsploit -m 52683Fetch the ExploitDB PoC locally; review the code before running it.
curl -s https://vulnpedia.com/cve/CVE-2026-86060/poc.jsonMachine-readable PoC index for this CVE (for automation).

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Mikrotik

Products Routeros

Weakness (CWE)

  • CWE-88: Improper neutralization of argument delimiters in a command ('argument injection')

CVSS vector

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

References and research data (JSON)

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

3 candidates

Additional exploitation reports

Source-specific reports, separate from CISA KEV. Repeated observations from one source are not independent confirmations.

  • ENISA EU KEV · 2026-09-05EUVD · EUVD-2026-72029
  • VulnCheck KEV · 2026-09-05T00:00:00Z

    Source guidance: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

    Source ransomware assessment: Unknown

    VulnCheck KEV · CVE-2026-86060 · Updated 2026-09-05T00:00:00Z
  • VulnCheck KEV · 2026-09-05T00:00:00ZVulnCheck KEV · CVE-2026-86060
    VulnCheck KEV · CVE-2026-86060
    VulnCheck KEV · CVE-2026-86060
  • VulnCheck KEV · 2026-09-06T00:00:00ZVulnCheck KEV · CVE-2026-86060
  • VulnCheck KEV · 2026-09-10T00:00:00ZVulnCheck KEV · CVE-2026-86060
  • VulnCheck KEV · 2026-09-11T00:00:00ZVulnCheck KEV · CVE-2026-86060
  • VulnCheck KEV · 2026-09-22T00:00:00ZVulnCheck KEV · CVE-2026-86060

Known Affected Software Configurations

VendorProductVersion range
MikrotikRouteros≥ 6.0 and < 6.49.21
MikrotikRouteros≥ 7.0 and < 7.23.4
MikrotikRouteros≥ 7.24 and < 7.24.2

All CVSS metrics

  • CRITICAL 9.2 v4.0 · CNA Primary
    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
  • CRITICAL 9.2 v4.0 · NVD Secondary
    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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • CRITICAL 9.8 v3.1 · NVD Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Exploit-tagged references (not proof of a PoC)

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS