What is CVE-2016-20042?

CVE-2016-20042 is a high-severity vulnerability in Trn Threaded Usenet News Reader, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-03-28.

How severe is CVE-2016-20042?

High severity. CVSS v3 base score is 8.4 out of 10.

Buffer overflow in Trn Threaded Usenet News Reader

CVE-2016-20042

TRN 3.6-23 contains a stack buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized argument to the application. Attackers can craft a malicious command-line argument with 156 bytes of…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (5.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Trn Threaded Usenet News Reader — versions 3.6-23

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

ExploitDB-39764 (exploit)
Official Product Homepage (product)
VulnCheck Advisory: TRN 3.6-23 Stack Buffer Overflow Local Code Execution (third-party-advisory)

Frequently asked questions

What is CVE-2016-20042?: CVE-2016-20042 is a high-severity vulnerability in Trn Threaded Usenet News Reader, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-03-28.
How severe is CVE-2016-20042?: High severity. CVSS v3 base score is 8.4 out of 10.