CVE-2004-1540

ZyXEL Prestige 623, 650, and 652 HW Routers, and possibly other versions, with HTTP Remote...

5.0 MediumPublic exploit

ZyXEL Prestige 623, 650, and 652 HW Routers, and possibly other versions, with HTTP Remote Administration enabled, does not require a password to access rpFWUpload.html, which allows remote attackers to reset the router configuration file.

Exploit likelihood

6.57%Down 0.2 points since Feb 4, 2022

What each source reports

NVD Score used 5.0

Record: CVE-2004-1540
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Updated: 2026-11-02

CVE List No score

Record: CVE-2004-1540
Updated: 2026-11-02

EUVDEUVD-2004-1534 No score

Record: EUVD-2004-1534
Updated: 2026-11-03

GitHub AdvisoriesGHSA-v4rc-26p2-jm4g No score

ZyXEL Prestige 623, 650, and 652 HW Routers, and possibly other versions, with HTTP Remote...

Record: GHSA-v4rc-26p2-jm4g
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	ZYXEL 3 Prestige Router - HTTP Remote Administration Configuration Reset	2004-11-22

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2004-1540 is a medium vulnerability (CVSS 5.0) in Zyxel Prestige, published December 31, 2004. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 6.57%, the 93rd percentile. No source names a fixed version.