An array index error in MikroTik RouterOS 6.41.3 through 6.46.5, and 7.x through 7.0…
Priority LOW 39CWE-129Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-129 and the CVSS impact.
Summary
An array index error in MikroTik RouterOS 6.41.3 through 6.46.5, and 7.x through 7.0 Beta5, allows an unauthenticated remote attacker to crash the SMB server via modified setup-request packets, aka SUP-12964.
Why it matters now
EPSS 0.03806 90th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:* | 6.41.3 – 6.46.5 | Vulnerable | MikroTik |
| cpe:2.3:o:mikrotik:routeros:7.0:beta3:*:*:*:*:*:* | 7.0 beta3 | Vulnerable | MikroTik |
| cpe:2.3:o:mikrotik:routeros:7.0:beta4:*:*:*:*:*:* | 7.0 beta4 | Vulnerable | MikroTik |
| cpe:2.3:o:mikrotik:routeros:7.0:beta5:*:*:*:*:*:* | 7.0 beta5 | Vulnerable | MikroTik |
- cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:* Versions 6.41.3 – 6.46.5 Vulnerable ·MikroTik
- cpe:2.3:o:mikrotik:routeros:7.0:beta3:*:*:*:*:*:* Versions 7.0 beta3 Vulnerable ·MikroTik
- cpe:2.3:o:mikrotik:routeros:7.0:beta4:*:*:*:*:*:* Versions 7.0 beta4 Vulnerable ·MikroTik
- cpe:2.3:o:mikrotik:routeros:7.0:beta5:*:*:*:*:*:* Versions 7.0 beta5 Vulnerable ·MikroTik
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-11881
- 2026-10-03 Alias added: GHSA-9vhh-7m5h-q2cr
- 2026-10-30 EPSS moved to the 90th–95th percentile
References
Advisory 1
More MikroTik Routeros vulnerabilities
- TI-2018-05369 A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS… KEVCVSS 3.1CRITICAL 9.8
- TI-2026-58872 SSH session privilege manipulation via a crafted username in Mikrotik RouterOS KEVCVSS 4.0CRITICAL 9.2
- TI-2018-10669 MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary… KEVCVSS 3.1CRITICAL 9.1
- TI-2026-47574 Kernel memory disclosure and denial of service in MikroTik RouterOS btest service KEVCVSS 4.0HIGH 8.8
- TI-2026-47576 SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS KEVCVSS 4.0MEDIUM 6.9
- TI-2022-22302 Out-of-bounds read in MicroTik RouterOS CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-11881 · CVE Program
- CVE-2020-11881 · NVD
- FIRST EPSS
- GHSA-9vhh-7m5h-q2cr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences