CVE-2020-29238

Expressvpn vulnerability

CVSS

7.5

EPSS

16.4%

EPSS pct

97th

Exploited

No known

An integer buffer overflow in the Nginx webserver of ExpressVPN Router version 1 allows remote attackers to obtain sensitive information when the server running as reverse proxy via specially crafted request.

Affected vendor

Expressvpn

Affected product

Expressvpn

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness type (CWE)

CWE-190 — Integer Overflow or Wraparound

Published

2021-03-10

Risk analysis

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

Its EPSS score of 16.4% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2020-29238

Confirm whether Expressvpn Expressvpn is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2020-29238.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-29238

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-29238 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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