Public proof of concept

CVE-2021-3438

A public proof of concept exists; no exploitation attested.

Published2021-05-20
WeaknessCWE-120

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

A potential buffer overflow in the software drivers for certain HP LaserJet products and Samsung product printers could lead to an escalation of privilege.

Timeline

dates in UTC

2021-05-2014:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

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-2021-3438?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-3438?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Hp color laser 150 4zb94a

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Hp color laser 150 4zb95a

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Hp color laser mfp 170 4zb96a

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

379 more products in the sources.

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

Fix

Advisories and patches

support.hp.comVendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedTobiasS1402/CVE-2021-3438CrackerCat/CVE-2021-3438

Sources

NVDCVSS 3.17.8read 2026-10-23
NVDCVSS 2.04.6read 2026-10-23
NVDweakness (CWE)CWE-120read 2026-10-23
FIRST EPSSEPSS score2.9 %2026-10-23
PoC-in-GitHubproof of concept2read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2021-05-20
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-3438?

A potential buffer overflow in the software drivers for certain HP LaserJet products and Samsung product printers could lead to an escalation of privilege.

Is CVE-2021-3438 actively exploited?

Active exploitation of CVE-2021-3438 has not been confirmed. Its EPSS score was 2.9% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-3438?

CVE-2021-3438 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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