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CVE-2000-1187

20
FAUCET Score

CVE-2000-1187 describes a buffer overflow vulnerability in the HTML parser of Netscape Navigator and Communicator versions 4.75 and earlier. This flaw allows remote attackers to execute arbitrary commands on a vulnerable system by providing an excessively long password value within a form field. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low attack complexity, potentially leading to full compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this older vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.75CPE matchmatch criteria
cpe:2.3:a:netscape:communicator:*:*:*:*:*:*:*:*
<= 4.75CPE matchmatch criteria
cpe:2.3:a:netscape:navigator:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.63%
Probability of exploitation in next 30 days
EPSS Percentile
84.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0263 is in the 72nd percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2000-1187

security flaw

Nov 27, 2000

References

ftp.freebsd.org / pub/FreeBSD/CERT/advisories/FreeBSD-SA-00:66.netscape.asc
PatchVendor Advisory
distro.conectiva.com.br / atualizacoes
lists.suse.com / archives/suse-security-announce/2000-Nov/0005.html
marc.info
exchange.xforce.ibmcloud.com / vulnerabilities/5542
osvdb.org / 7207
redhat.com / support/errata/RHSA-2000-109.html
PatchVendor Advisory