CVE-2002-1071
ZyXEL Prestige 642R allows remote attackers to cause a denial of service in the Telnet, FTP, and DHCP services (crash) via a TCP packet with both the SYN and ACK flags set.
Does this matter?
A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 3.3%. Treat it as high on anything reachable from the internet.
Description
ZyXEL Prestige 642R allows remote attackers to cause a denial of service in the Telnet, FTP, and DHCP services (crash) via a TCP packet with both the SYN and ACK flags set.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 3.32% probability · 88th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 17 July 2002
- CISA KEV
- Not listed
- Affected
- zyxel/prestige
- Source
- cve@mitre.org
EPSS 3.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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://online.securityfocus.com/archive/1/277242
- http://online.securityfocus.com/archive/1/277303
- http://online.securityfocus.com/archive/1/277307
- http://www.iss.net/security_center/static/9372.phpPatch, Vendor Advisory
- http://www.securityfocus.com/bid/5034Exploit, Patch, Vendor Advisory
- http://online.securityfocus.com/archive/1/277242
- http://online.securityfocus.com/archive/1/277303
- http://online.securityfocus.com/archive/1/277307
- http://www.iss.net/security_center/static/9372.phpPatch, Vendor Advisory
- http://www.securityfocus.com/bid/5034Exploit, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.