CVE-2001-0402

highpriority · track · 41EPSS 0.024 · 84 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

2.44% (84th) EPSS

CVSS 7.5 · high

Is it mine?

4 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

IPFilter 3.4.16 and earlier does not include sufficient session information in its cache, which allows remote attackers to bypass access restrictions by sending fragmented packets to a restricted port after sending unfragmented packets to an unrestricted port.

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.5

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.06.8mediumAV:N/AC:L/Au:N/C:P/I:P/A:P/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USLLM-inferredCWE-310USLLM-inferred

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-20730IPFilter 3.x - Fragment Rule Bypassfunctional · exploit_db

affected products (4)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
darren reed ipfilter≤ 3.4.16nvdUScpe:2.3:a:darren_reed:ipfilter:*:*:*:*:*:*:*:*
freebsd freebsd≤ 4.1nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
openbsd openbsd= 2.8nvdUScpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*

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 2001-06-18modified 2026-06-16

references (6)

External citations — patches, advisories, analysis.

scry

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