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CVE-1999-0077

39
FAUCET Score

CVE-1999-0077 describes a vulnerability in Microsoft Windows NT where predictable TCP sequence numbers allow for session hijacking or spoofing. This medium-severity flaw, with a CVSS score of 5.0, can be exploited remotely with low attack complexity, potentially leading to information disclosure. While there is no evidence of active exploitation or Metasploit modules, an ExploitDB entry exists for a similar issue in Linux Kernel 2.2, and the vulnerability has garnered minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
30.87%
Probability of exploitation in next 30 days
EPSS Percentile
98.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-19522 · Sep 27, 1999
This CVE's current EPSS score of 0.3087 is in the 98th percentile among its peer group of 23,725 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Advisories (1)

redhatCVE-1999-0077

CVE-1999-0077

References

exchange.xforce.ibmcloud.com / vulnerabilities/139