THREATPORT/VULNERABILITY/CVE-2020-20236
MEDIUM SEVERITY

CVE-2020-20236

Routeros vulnerability

CVSS
6.5
EPSS
3.2%
EPSS pct
87th
Exploited
No known
Mikrotik RouterOs 6.46.3 (stable tree) suffers from a memory corruption vulnerability in the /nova/bin/sniffer process. An authenticated remote attacker can cause a Denial of Service due to improper memory access.
Affected vendor
Mikrotik
Affected product
Routeros
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
Published
2021-05-18

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2020-20236

  • Confirm whether Mikrotik Routeros is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2020-20236.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-20236

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-20236 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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