CVE-2026-105840

lrzsz before 0.13.0 contains a path traversal vulnerability in the lrz receive utility's restricted mode that allows malicious ZMODEM senders to write files outside the current directory using absolute pathnames. Because checkpath() in src/lrz.c only rejects '../' sequences unless built with --enable-pubdir, attackers can send files named with absolute paths to overwrite any file writable by the receiving user.

CVSS 4.0

7.7CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-25)

CWE

CWE-22

Published

2026-10-06

Modified

2026-10-09

Record from

the NVD, synced 2026-10-19

References

• https://ohse.de/uwe/software/lrzsz.html
• https://ohse.de/uwe/software/lrzsz/NEWS-0.13.0.html
• https://www.vulncheck.com/advisories/lrzsz-before-0.13.0-path-traversal-via-lrz-restricted-mode-checkpath

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