PJL directory traversal vulnerability in Lexmark devices through 2021-12-07 that can be leveraged to overwrite internal configuration files.

published 2022-01-20 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-31552

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.4%; EPSS 1.4% chance of exploitation in 30 days, percentile 73%
public exploits: 0; none known

Patch / fix

fixed in 20

lexmark b2236_firmware mslsg.076.294
lexmark mb2236_firmware mxlsg.076.294
lexmark ms431_firmware mslbd.076.294
lexmark ms331_firmware mslbd.076.294
lexmark m1342_firmware mslbd.076.294
lexmark b3442_firmware mslbd.076.294
lexmark b3340_firmware mslbd.076.294
lexmark xm1342_firmware mslbd.076.294
lexmark mx331_firmware mxlbd.076.294
lexmark mx431_firmware mxlbd.076.294
lexmark mb3442_firmware mxlbd.076.294
lexmark ms321_firmware msngm.076.294
lexmark ms421_firmware msngm.076.294
lexmark ms521_firmware msngm.076.294
lexmark ms621_firmware msngm.076.294
lexmark m1242_firmware msngm.076.294
lexmark m1246_firmware msngm.076.294
lexmark b2338_firmware msngm.076.294
lexmark b2442_firmware msngm.076.294
lexmark b2546_firmware msngm.076.294

Exploit prediction

1.44% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	8.3	AV:A/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

support.lexmark.com /alerts/
vendor-advisory
zerodayinitiative.com /advisories/ZDI-22-333/
third-party-advisory, vdb-entry

Sources

CVE List CVE-2021-44737
NVD CVE-2021-44737

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary