CVE-2001-1194

Zyxel Prestige 681 and 1600 - Denial of Service via Malformed IP Packets

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2001-1194. PoCs published by Przemyslaw Frasunek.

AI-analyzed exploit summary This exploit leverages a vulnerability in Zyxel Prestige DSL routers where fragmented packets exceeding 64KB crash the device, requiring a power cycle. The provided command uses ping to send oversized fragmented packets to trigger the DoS condition.

Description

Zyxel Prestige 681 and 1600 SDSL Routers allow remote attackers to cause a denial of service via malformed packets with (1) an IP length less than actual packet size, or (2) fragmented packets whose size exceeds 64 kilobytes after reassembly.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Przemyslaw Frasunek · textremotehardware
https://www.exploit-db.com/exploits/21186

This exploit leverages a vulnerability in Zyxel Prestige DSL routers where fragmented packets exceeding 64KB crash the device, requiring a power cycle. The provided command uses ping to send oversized fragmented packets to trigger the DoS condition.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Zyxel Prestige DSL routers
No auth needed
Prerequisites: Network access to the target router's DSL interface
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory mailing-list x_refsource_bugtraq
http://archives.neohapsis.com/archives/bugtraq/2001-12/0190.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/7704
Third Party Advisory mailing-list x_refsource_bugtraq
http://archives.neohapsis.com/archives/bugtraq/2001-12/0140.html
Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/3695

Scores

EPSS 0.0326
EPSS Percentile 86.7%

Details

Status published
Products (2)
zyxel/prestige_1600
zyxel/prestige_681
Published Dec 14, 2001
Tracked Since Feb 18, 2026