CVE-2020-20264: mikrotik routeros Divide By Zero
CVSS: 6.5v3.1MediumModified
Published 19-05-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-20264 is a medium (CVSS 6.5) Divide By Zero vulnerability in mikrotik routeros. EPSS estimates a 2.10% chance of exploitation in the next 30 days, higher than 81.5% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
2.10%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 19-05-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Mikrotik RouterOs before 6.47 (stable tree) in the /ram/pckg/advanced-tools/nova/bin/netwatch process. An authenticated remote attacker can cause a Denial of Service due to a divide by zero error.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesSingle source
Medium 4.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
2.10%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
0.00 pp
From 2.10% on 21-09-2026
21-09-202621-10-2026
EPSS score2.10%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (seclists.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Mikrotik1 product
- routeros< 6.47
1 vendor · 1 product
References
2 links- github.com/cq674350529/pocs_slides/blob/master/pocs/MikroTik/vul_netwatch/README.mdX Refsource MISCBroken LinkThird Party Advisory