Critical 9.8Published Jun 1, 2026

CVE-2018-25427Arm Whois 3.11 Buffer Overflow via SEH Overwrite

Updated under an hour ago (Oct 25, 2026, 10:23 PM ET)

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It affects Armcode Arm Whois. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Armcode Arm Whois

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jun 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Armcode Arm Whois armcode:arm_whois (from the name)	3.11	CNA record

References

https://www.exploit-db.com/exploits/45796exploit
http://www.armcode.com/product
http://www.armcode.com/downloads/arm-whois.exeproduct
https://www.vulncheck.com/advisories/arm-whois-buffer-overflow-via-seh-overwritethird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.