CVE-2018-25427

CRITICAL 9.8

Arm Whois 3.11 Buffer Overflow via SEH Overwrite

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

Arm Whois 3.11 contains a stack-based buffer overflow vulnerability that allows remote attackers to execute arbitrary code by supplying oversized input to the IP address or domain field. Attackers can craft malicious input exceeding 658 bytes with shellcode to overwrite the structured exception handler and gain command execution when the application processes the input.

CWE	CWE-121
Vendor	armcode
Product	arm whois
Published	Jun 1, 2026
Last Updated	Jun 2, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Armcode / Arm Whois

3.11

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/45796 armcode.com: http://www.armcode.com/ armcode.com: http://www.armcode.com/downloads/arm-whois.exe vulncheck.com: https://www.vulncheck.com/advisories/arm-whois-buffer-overflow-via-seh-overwrite

Credits

Yair Rodríguez Aparicio (0-day DoS exploit), Semen Alexandrovich Lyhin (1-day fully working exploit)