CVE-2021-3438

HIGH

HP LaserJet and Samsung Printer Drivers - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2021-3438. PoCs published by CrackerCat, TobiasS1402.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2021-3438, targeting a buffer overflow in HP LaserJet and Samsung printer drivers. The exploit leverages kernel memory manipulation via DeviceIoControl to achieve local privilege escalation (LPE).

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.

Exploits (2)

nomisec WORKING POC
by CrackerCat · poc
https://github.com/CrackerCat/CVE-2021-3438

This repository contains a functional exploit for CVE-2021-3438, targeting a buffer overflow in HP LaserJet and Samsung printer drivers. The exploit leverages kernel memory manipulation via DeviceIoControl to achieve local privilege escalation (LPE).

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: HP LaserJet and Samsung printer drivers (SSPORT.sys and BS_RCIO64.sys)
No auth needed
Prerequisites: NX (No-Execute) feature must be disabled · Access to vulnerable driver files (SSPORT.sys, BS_RCIO64.sys)
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec SCANNER
by TobiasS1402 · poc
https://github.com/TobiasS1402/CVE-2021-3438

The repository contains PowerShell scripts designed to detect and remediate printer drivers vulnerable to CVE-2021-3438. The scripts check for specific manufacturer and model patterns but do not include exploit code.

Classification
Scanner 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler with vulnerable printer drivers (Samsung, HP, Xerox, etc.)
Auth required
Prerequisites: Access to a Windows system with vulnerable printer drivers installed · Local or domain administrative privileges to enumerate printer drivers
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 7.8
EPSS 0.0290
EPSS Percentile 85.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-120
Status published
Products (50)
hp/color_laser_150_4zb94a
hp/color_laser_150_4zb95a
hp/color_laser_mfp_170_4zb96a
hp/color_laser_mfp_170_4zb97a
hp/color_laser_mfp_170_6hu08a
hp/color_laser_mfp_170_6hu09a
hp/laser_100_209u7a
hp/laser_100_4zb79a
hp/laser_100_4zb80a
hp/laser_100_4zb81a
... and 40 more
Published May 20, 2021
Tracked Since Feb 18, 2026