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Vulnerability record · CVE-2012-4999 · published 19 September 2012

CVE-2012-4999: Mercurycom mr804 firmware improper input validation vulnerability

Mercurycom · Mr804 Firmware

Mercury MR804 Router 8.0 3.8.1 Build 101220 Rel.53006nB allows remote attackers to cause a denial of service (service hang) via a crafted string in HTTP header fields such as (1) If-Modified-Since, (2) If-None-Match, or (3) If-Unmodified-Since. NOTE: some of these details are obtained from third party information.

6.1 CVSS 2.0 Medium EPSS 6.6% · top 6.4% CWE-20 · Improper input validation
6.1CVSS 2.0 base score
6.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

Mercury MR804 Router 8.0 3.8.1 Build 101220 Rel.53006nB allows remote attackers to cause a denial of service (service hang) via a crafted string in HTTP header fields such as (1) If-Modified-Since, (2) If-None-Match, or (3) If-Unmodified-Since. NOTE: some of these details are obtained from third party information.

AV:A/AC:L/Au:N/C:N/I:N/A:C

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://archives.neohapsis.com/archives/bugtraq/2012-02/0116.html Exploit
http://secunia.com/advisories/48079 Vendor Advisory
http://www.securityfocus.com/bid/52106 Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/73383
http://archives.neohapsis.com/archives/bugtraq/2012-02/0116.html Exploit
http://secunia.com/advisories/48079 Vendor Advisory
http://www.securityfocus.com/bid/52106 Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/73383

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2012-4999), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.