What is CVE-2019-16161?

CVE-2019-16161 is a high-severity vulnerability in K-Takata Onigmo, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-09-09.

How severe is CVE-2019-16161?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2019-16161 known to be exploited?

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

NULL pointer dereference in K-Takata Onigmo

CVE-2019-16161

Onigmo through 6.2.0 has a NULL pointer dereference in onig_error_code_to_str because of fetch_token in regparse.c.

Published 2019-09-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.021 (80.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

K-Takata Onigmo

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

github.com/k-takata/Onigmo/issues/132 (Exploit, Third Party Advisory)
github.com/k-takata/Onigmo/commit/9827d5a0298ee766f6041db9c0080166ff6cdce8 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-16161?: CVE-2019-16161 is a high-severity vulnerability in K-Takata Onigmo, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-09-09.
How severe is CVE-2019-16161?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-16161 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.