What is CVE-2025-61143?

CVE-2025-61143 is a medium-severity vulnerability in Libtiff, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-02-23.

How severe is CVE-2025-61143?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Libtiff

CVE-2025-61143

libtiff up to v4.7.1 was discovered to contain a NULL pointer dereference via the component libtiff/tif_open.c.

Published 2026-02-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (1.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Libtiff

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

gitlab.com/libtiff/libtiff/-/issues/737 (Issue Tracking)
gitlab.com/libtiff/libtiff/-/merge_requests/755 (Issue Tracking)
gist.github.com/optionGo/9c024cd8e7b131463b84dc60af9bb0aa (Third Party Advisory)

Frequently asked questions

What is CVE-2025-61143?: CVE-2025-61143 is a medium-severity vulnerability in Libtiff, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-02-23.
How severe is CVE-2025-61143?: Medium severity. CVSS v3 base score is 5.5 out of 10.