What is CVE-2023-26068?

CVE-2023-26068 is a critical-severity vulnerability in Lexmark B2236, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2023-04-10.

How severe is CVE-2023-26068?

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

Is CVE-2023-26068 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Lexmark B2236

CVE-2023-26068

Certain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 2 of 4).

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2023-04-10 · 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: 0.116 (95.9th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.116 · newest: 0.116 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

References

support.lexmark.com/alerts/ (Vendor Advisory)
publications.lexmark.com/publications/security-alerts/CVE-2023-26068.pdf (Vendor Advisory)
packetstormsecurity.com/files/174763/Lexmark-Device-Embedded-Web-Server-Remote-…

Frequently asked questions

What is CVE-2023-26068?: CVE-2023-26068 is a critical-severity vulnerability in Lexmark B2236, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2023-04-10.
How severe is CVE-2023-26068?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-26068 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.