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CVE-1999-0853

27
FAUCET Score

CVE-1999-0853 describes a critical buffer overflow vulnerability affecting Netscape Enterprise Server and Netscape FastTrack Server. This flaw allows remote, unauthenticated attackers to gain full control over the affected systems by exploiting weaknesses in the HTTP Basic Authentication process. With a CVSS score of 10.0, this vulnerability presents a high risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. Despite its age and high severity, there is no evidence of active exploitation, readily available exploit code in common frameworks, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.5.1CPE matchmatch criteria
cpe:2.3:a:netscape:enterprise_server:3.5.1:*:*:*:*:*:*:*
3.6CPE matchmatch criteria
cpe:2.3:a:netscape:enterprise_server:3.6:*:*:*:*:*:*:*
3.6CPE matchmatch criteria
cpe:2.3:a:netscape:enterprise_server:3.6:sp2:*:*:*:*:*:*
3.01CPE matchmatch criteria
cpe:2.3:a:netscape:fasttrack_server:3.01:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
3.40%
Probability of exploitation in next 30 days
EPSS Percentile
87.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0340 is in the 78th percentile among its peer group of 51,485 CVEs.

Social Chatter

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

Remediation records are not available for this CVE.

References

securityfocus.com / bid/847