CVE-2020-20231: mikrotik routeros NULL Pointer Dereference
CVSS: 6.5v3.1MediumModified
Published 14-07-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-20231 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in mikrotik routeros. EPSS estimates a 2.01% chance of exploitation in the next 30 days, higher than 80.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
2.01%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 14-07-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Mikrotik RouterOs through stable version 6.48.3 suffers from a memory corruption vulnerability in the /nova/bin/detnet process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference).
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
2.01%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
0.00 pp
From 2.01% on 21-09-2026
21-09-202621-10-2026
EPSS score2.01%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundPocs Slides
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Mikrotik1 product
- routeros≥ 6.44.6, ≤ 6.48.3
1 vendor · 1 product
References
2 links- github.com/cq674350529/pocs_slides/blob/master/advisory/MikroTik/CVE-2020-20231/README.mdX Refsource MISCExploitThird Party Advisory