What is CVE-2021-44738?

CVE-2021-44738 is a critical-severity vulnerability in Lexmark 6500e, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-01-20.

How severe is CVE-2021-44738?

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

Buffer overflow in Lexmark 6500e

CVE-2021-44738

Buffer overflow vulnerability has been identified in Lexmark devices through 2021-12-07 in postscript interpreter.

Vulnerability class: Buffer Overflow

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: 0.033 (88.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

support.lexmark.com/alerts/ (Vendor Advisory)
www.zerodayinitiative.com/advisories/ZDI-22-327/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-22-328/ (VDB Entry, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-22-382/ (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-44738?: CVE-2021-44738 is a critical-severity vulnerability in Lexmark 6500e, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-01-20.
How severe is CVE-2021-44738?: Critical severity. CVSS v3 base score is 9.8 out of 10.