No exploitation reportedFix available

CVE-2021-22940

Q: Is CVE-2021-22940 actively exploited?

Active exploitation of CVE-2021-22940 has not been confirmed. Its EPSS score was 13.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-22940?

CVE-2021-22940 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

No exploitation reported by the sources we read.

Published2021-08-16
Fixed in16.6.2 · 14.17.5 · 12.22.5
WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Node.js before 16.6.1, 14.17.5, and 12.22.5 is vulnerable to a use after free attack where an attacker might be able to exploit the memory corruption, to change process behavior.

Timeline

dates in UTC

2021-08-1619:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-22940?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-22940?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Node.js

Branch	Affected	Fixed in	Source
16.x	≥ 16.0.0, < 16.6.2	16.6.2	NVD · OSV
14.x	≥ 14.0.0, < 14.17.5	14.17.5	NVD · OSV
12.x	≥ 12.0.0, < 12.22.5	12.22.5	NVD · OSV

Oracle peoplesoft enterprise peopletools

Branch	Affected	Fixed in	Source
8.57	= 8.57	no fix published	NVD
8.58	= 8.58	no fix published	NVD
8.59	= 8.59	no fix published	NVD

Oracle graalvm

Branch	Affected	Fixed in	Source
20.3	= 20.3.3	no fix published	NVD
21.2	= 21.2.0	no fix published	NVD

4 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

nodejsAlmaLinux:8all versions · fixed in 1:12.22.5-1.module_el8.4.0+2529+af52a4c7and 3 other packages
nodejsAlmaLinux:8all versions · fixed in 1:12.22.5-1.module_el8.5.0+85+79a7b441and 2 other packages
nodejs-nodemonAlmaLinux:8all versions · fixed in 2.0.3-1.module_el8.4.0+2521+c668cc9f
nodejs-packagingAlmaLinux:8all versions · fixed in 17-3.module_el8.3.0+2023+d2377ea3
nodejs-packagingAlmaLinux:8all versions · fixed in 17-3.module_el8.4.0+2224+b07ac28e
nodejs-packagingAlmaLinux:8all versions · fixed in 17-3.module_el8.4.0+2521+c668cc9f
nodejs-packagingAlmaLinux:8all versions · fixed in 23-3.module_el8.4.0+2522+3bd42762
nodejs-packagingAlmaLinux:8all versions · fixed in 23-3.module_el8.5.0+254+b4526b16

2 more package ranges on OSV.dev

Full record on NVD

Fix

Update Node.js to 16.6.2 · 14.17.5 · 12.22.5

Advisories and patches

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-416read 2026-10-23
NVDweakness (CWE)CWE-416read 2026-10-23
FIRST EPSSEPSS score13.9 %read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: 2021-08-16
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-22940?

Node.js before 16.6.1, 14.17.5, and 12.22.5 is vulnerable to a use after free attack where an attacker might be able to exploit the memory corruption, to change process behavior.

Is CVE-2021-22940 actively exploited?

Active exploitation of CVE-2021-22940 has not been confirmed. Its EPSS score was 13.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-22940?

CVE-2021-22940 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Running Node.js? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database