CVE-1999-1291

mediumpriority · track · 25EPSS 0.133 · 96 %ileEUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

13.3% (96th) EPSS

CVSS 5 · medium

Is it mine?

3 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-28

TCP/IP implementation in Microsoft Windows 95, Windows NT 4.0, and possibly others, allows remote attackers to reset connections by forcing a reset (RST) via a PSH ACK or other means, obtaining the target's last sequence number from the resulting packet, then spoofing a reset to the target.

cvss

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USLLM-inferredCWE-476USLLM-inferred

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft windows 95all versionsnvdUScpe:2.3:o:microsoft:windows_95:*:*:*:*:*:*:*:*
microsoft windows nt= 4.0nvdUScpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 1998-10-05modified 2026-06-16

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan