Detections
Analytics

Echo: libmicrohttpd-0.9.70: security update to 0.9.70+e1

critical Tenable Cloud Security Plugin ID 476426

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - A flaw was found in libmicrohttpd. A missing bounds check in the post_process_urlencoded function leads to
 a buffer overflow, allowing a remote attacker to write arbitrary data in an application that uses
 libmicrohttpd. The highest threat from this vulnerability is to data confidentiality and integrity as well
 as system availability. Only version 0.9.70 is vulnerable. (CVE-2021-3466)

Solution

Update the libmicrohttpd-0.9.70 library and its related packages to version 0.9.70+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2021-3466

Plugin Details

Severity: Critical

ID: 476426

Version: Revision 1.1

Type: Local

Published: 10/21/2026

Updated: 10/21/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.12

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2021-3466

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/21/2026

Vulnerability Publication Date: 3/25/2021

Reference Information

CVE: CVE-2021-3466