THREATPORT/VULNERABILITY/CVE-2020-26139
MEDIUM SEVERITY

CVE-2020-26139

Netbsd vulnerability

CVSS
5.3
EPSS
6.5%
EPSS pct
93th
Exploited
No known
An issue was discovered in the kernel in NetBSD 7.1. An Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. This might be abused in projected Wi-Fi networks to launch denial-of-service attacks against connected clients and makes it easier to exploit other vulnerabilities in connected clients.
Affected vendor
Netbsd
Affected product
Netbsd
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-287 — Improper Authentication
Published
2021-05-11

Risk analysis

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

Its EPSS score of 6.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2020-26139

  • Confirm whether Netbsd Netbsd is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2020-26139.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-26139

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-26139 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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