CVE-2004-1540

CVE-2004-1540 is a medium-severity vulnerability in Zyxel Prestige with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

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.

Frequently asked questions

What is CVE-2004-1540?
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.
How severe is CVE-2004-1540?
CVE-2004-1540 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2004-1540 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-1540?
CVE-2004-1540 primarily affects Zyxel Prestige. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-1540?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-1540 published?
CVE-2004-1540 was published on 2004-12-31 and last updated on 2026-06-16.

References

Affected products (8)

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