CVE-2017-7183
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.
Does this matter?
A public exploit is published in Exploit-DB and the impact is high, while EPSS rates exploitation at 5.9%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
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
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 5.95% probability · 93th percentile
- Public exploits
- 1 in Exploit-DB · first 20 March 2017
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- extraputty/extraputty
- Source
- cve@mitre.org
EPSS moved from 4.9% on 21 September 2026 to 5.9% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/141705/ExtraPuTTY-029_rc2-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/archive/1/540300/100/0/threaded
- http://www.securityfocus.com/bid/96973Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41639/
- http://packetstormsecurity.com/files/141705/ExtraPuTTY-029_rc2-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/archive/1/540300/100/0/threaded
- http://www.securityfocus.com/bid/96973Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41639/
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.