What is CVE-2021-44734?

CVE-2021-44734 is a critical-severity vulnerability in Lexmark 6500e, classified under Code Injection. CVSS score: 9.8/10. Published 2022-01-20.

How severe is CVE-2021-44734?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Lexmark 6500e

CVE-2021-44734

Embedded web server input sanitization vulnerability in Lexmark devices through 2021-12-07, which can which can lead to remote code execution on the device.

Vulnerability class: RCE (Remote Code Execution)

Published 2022-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.064 (93.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.064 · newest: 0.064 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-94 — Code Injection

References

support.lexmark.com/alerts/ (Vendor Advisory)
www.zerodayinitiative.com/advisories/ZDI-22-332/ (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-44734?: CVE-2021-44734 is a critical-severity vulnerability in Lexmark 6500e, classified under Code Injection. CVSS score: 9.8/10. Published 2022-01-20.
How severe is CVE-2021-44734?: Critical severity. CVSS v3 base score is 9.8 out of 10.