What’s Vulnerable › Vulnerabilities

CVE-2020-20250

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-07-13 · updated 2026-06-17
• Weakness: CWE-476

Description

Mikrotik RouterOs before stable version 6.47 suffers from a memory corruption vulnerability in the /nova/bin/lcdstat process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference). NOTE: this is different from CVE-2020-20253 and CVE-2020-20254. All four vulnerabilities in the /nova/bin/lcdstat process are discussed in the CVE-2020-20250 github.com/cq674350529 reference.

Affected products

• MikroTik RouterOS: before 6.47 — fixed in 6.47

How to fix

Upgrade to a fixed version: MikroTik RouterOS 6.47. Check the vendor advisory for mitigations.

References

• https://github.com/cq674350529/pocs_slides/blob/master/advisory/MikroTik/CVE-2020-20250/README.md
• https://mikrotik.com/
• https://github.com/cq674350529/pocs_slides/blob/master/advisory/MikroTik/CVE-2020-20250/README.md
• https://mikrotik.com/

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