CVE-2020-11881
HIGHCVSS 7.5/10EPSS 4.34%
Last modified
CVE-2020-11881 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 4.34% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Mikrotik | Routeros | >= 6.41.3, <= 6.46.5 | — |
| Mikrotik | Routeros | 7.0 | Beta3 |
References
- https://github.com/botlabsDev/CVE-2020-11881Exploit, Third Party Advisory
- https://mikrotik.comVendor Advisory
- https://github.com/botlabsDev/CVE-2020-11881Exploit, Third Party Advisory
- https://mikrotik.comVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-11881?
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.
How severe is CVE-2020-11881?
CVE-2020-11881 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.34% probability of exploitation in the next 30 days.
How do I fix CVE-2020-11881?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-11881?
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Scan your code nowSource: NVD / NIST