P4Verified

CVE-2021-21295: netty before 4.1.60 (exclusive); +8 more affected products

CVE-2021-21295. CVSS 3.1 base score 5.9 (MEDIUM, NVD). EPSS 0.18891 (percentile 0.97229), scored 2026-10-08.

Affected technology

netty · before 4.1.60 (exclusive)
netty

oncommand api services · Version not applicable in the source CPE
netapp

oncommand workflow automation · Version not applicable in the source CPE
netapp

debian linux · 10.0
debian

quarkus · through 1.13.7 (inclusive)
quarkus

kudu · before 1.16.0 (exclusive)
apache

zookeeper · 3.5.9
apache

communications cloud native core policy · 1.14.0
oracle

io.netty:netty-codec-http2 · < 4.1.60.Final
netty

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Users may assume the content-length is validated somehow, which is not the case. Vendor/CNA’s CVSS 3.1 assessment (base score 5.9/10) rates confidentiality and availability impact as none; integrity impact as high. NVD’s CVSS 3.1 assessment (base score 5.9/10) rates confidentiality and availability impact as none; integrity impact as high.

Published 2026-10-09 03:15:30.201130+00:00

CWE: CWE-444
CCR priority: 28.3 /100 (P4)
CVSS 3.1: 5.9 /10 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N · NVD
EPSS: 0.18891 · percentile 0.97229 · 2026-10-08
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-09 03:13:32.966430+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2021-21295.html