CVE-2021-36221

Go vulnerability

CVSS

5.9

EPSS

3.1%

EPSS pct

87th

Exploited

No known

Go before 1.15.15 and 1.16.x before 1.16.7 has a race condition that can lead to a net/http/httputil ReverseProxy panic upon an ErrAbortHandler abort.

Affected vendor

Golang

Affected product

CVSS vector

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

Weakness type (CWE)

CWE-362 — Race Condition

Published

2021-08-08

Risk analysis

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

Its EPSS score of 3.1% 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-2021-36221

Confirm whether Golang Go is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-36221.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-36221

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-36221 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2021-36221?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2021-36221.

Start free scan

No credit card. Agentless.

Related vulnerabilities

Ultraiso vulnerability

MEDIUM

CVE-2006-2101

Winiso vulnerability