Medium severity6.5NVD Advisory· Published May 18, 2021· Updated Jun 17, 2026

CVE-2020-20253

Description

Mikrotik RouterOs before 6.47 (stable tree) suffers from a divison by zero vulnerability in the /nova/bin/lcdstat process. An authenticated remote attacker can cause a Denial of Service due to a divide by zero error.

Affected products

Mikrotik/Routeros2 versions
cpe:2.3:o:mikrotik:routeros:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:o:mikrotik:routeros:*:*:*:*:-:*:*:*range: <6.47
- (no CPE)range: <6.47
Mikrotik/RouterOsdescription

Patches

Vulnerability mechanics

References

seclists.org/fulldisclosure/2021/May/14nvdExploitMailing ListThird Party Advisory
github.com/cq674350529/pocs_slides/blob/master/pocs/MikroTik/vul_lcdstat_4/README.mdnvdBroken LinkThird Party Advisory

News mentions

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cvss	0.423
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000