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Vulnerability record · CVE-2017-7183 · published 27 March 2017

CVE-2017-7183: Extraputty improper input validation vulnerability

Extraputty · Extraputty

The TFTP server in ExtraPuTTY 0.30 and earlier allows remote attackers to cause a denial of service (crash) via a large (1) read or (2) write TFTP protocol message.

7.5 CVSS 3.0 High EPSS 5.9% · top 7.0% CWE-20 · Improper input validation
7.5CVSS 3.0 base score, v2 5.0
5.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The TFTP server in ExtraPuTTY 0.30 and earlier allows remote attackers to cause a denial of service (crash) via a large (1) read or (2) write TFTP protocol message.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/141705/ExtraPuTTY-029_rc2-Denial-Of-Service.html ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/archive/1/540300/100/0/threaded
http://www.securityfocus.com/bid/96973 Third Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/41639/
http://packetstormsecurity.com/files/141705/ExtraPuTTY-029_rc2-Denial-Of-Service.html ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/archive/1/540300/100/0/threaded
http://www.securityfocus.com/bid/96973 Third Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/41639/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-7183), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.