What’s Vulnerable › Vulnerabilities

CVE-2016-20042: TRN 3.6-23 Stack Buffer Overflow Local Code Execution

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-28 · updated 2026-06-17
• Weakness: CWE-787

Description

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 padding followed by a return address to overwrite the instruction pointer and execute shellcode with user privileges.

Affected products

• trn Threaded USENET News Reader: 3.6-23

References

• https://sourceforge.net/projects/trn/
• https://www.exploit-db.com/exploits/39764
• https://www.vulncheck.com/advisories/trn-23-stack-buffer-overflow-local-code-execution

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