CVE-2020-20254

Mikrotik RouterOs before 6.47 (stable tree) 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).

• CWE-787

• http://seclists.org/fulldisclosure/2021/May/14Exploit, Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/May/14Exploit, Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/May/14Exploit, Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/May/14Exploit, Mailing List, Third Party Advisory
• https://github.com/cq674350529/pocs_slides/blob/master/pocs/MikroTik/vul_lcdstat_2/README.mdBroken Link, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/May/14Exploit, Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/May/14Exploit, Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/May/14Exploit, Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/May/14Exploit, Mailing List, Third Party Advisory
• https://github.com/cq674350529/pocs_slides/blob/master/pocs/MikroTik/vul_lcdstat_2/README.mdBroken Link, Third Party Advisory

Published

May 18, 2021

Last Modified

Jun 17, 2026

Status

Modified

• 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.

• CVE-2020-20248Mikrotik RouterOs before stable 6.47 suffers from an uncontr…6.5
• CVE-2020-20249Mikrotik RouterOs before stable 6.47 suffers from a memory c…6.5
• CVE-2020-2025Kata Containers before 1.11.0 on Cloud Hypervisor persists g…8.8
• CVE-2020-20250Mikrotik RouterOs before stable version 6.47 suffers from a …6.5
• CVE-2020-20252Mikrotik RouterOs before stable version 6.47 suffers from a …6.5
• CVE-2020-20253Mikrotik RouterOs before 6.47 (stable tree) suffers from a d…6.5
• CVE-2020-2026A malicious guest compromised before a container creation (e…8.8
• CVE-2020-20262Mikrotik RouterOs before 6.47 (stable tree) suffers from an …6.5
• CVE-2020-20264Mikrotik RouterOs before 6.47 (stable tree) in the /ram/pckg…6.5
• CVE-2020-20265Mikrotik RouterOs before 6.47 (stable tree) suffers from a m…6.5
• CVE-2020-20266Mikrotik RouterOs before 6.47 (stable tree) suffers from a m…6.5
• CVE-2020-20267Mikrotik RouterOs before 6.47 (stable tree) suffers from a m…6.5