CVE-2005-3675 — The Transmission Control Protocol (TCP) allows remote attackers to cause a denial of service (bandwidth consumption) by sending ACK messages for packets that have not yet been received (optimistic ACKs), which can cause the sender to increase its transmission rate until it fills available bandwidth

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HIGH

The Transmission Control Protocol (TCP) allows remote attackers to cause a denial of service (bandwidth consumption) by sending ACK messages for packets that have not yet been received (optimistic ACKs), which can cause the sender to increase its transmission rate until it fills available bandwidth

Published Nov 18, 2005

7.8

HIGH

CVSS 2.0

EPSS 2.32%

Description

The Transmission Control Protocol (TCP) allows remote attackers to cause a denial of service (bandwidth consumption) by sending ACK messages for packets that have not yet been received (optimistic ACKs), which can cause the sender to increase its transmission rate until it fills available bandwidth.

Affected products

Remediation

No remediation recorded yet.

Metrics

2.32% 0.02317

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.02317

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (12 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	2.32% (0.02317)	82.82th	v5 (v2026.06.15)
Jun 15, 2026	2.32% (0.02317)	81.14th	v5 (v2026.06.15)
Dec 31, 2025	5.45% (0.05452)	89.89th	v4 (v2025.03.14)
Apr 20, 2025	2.40% (0.02398)	84.13th	v4 (v2025.03.14)
Mar 17, 2025	1.21% (0.01214)	77.64th	v4 (v2025.03.14)
Dec 12, 2024	1.24% (0.01239)	86.07th	v3 (v2023.03.01)
May 3, 2024	1.34% (0.01337)	85.96th	v3 (v2023.03.01)
Mar 7, 2023	1.34% (0.01337)	83.96th	v3 (v2023.03.01)
Mar 6, 2023	1.21% (0.01213)	66.61th	v2 (v2022.01.01)
Feb 17, 2023	1.21% (0.01213)	66.22th	v2 (v2022.01.01)
Apr 1, 2022	1.21% (0.01213)	64.21th	v2 (v2022.01.01)
Feb 4, 2022	1.21% (0.01213)	40.54th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (4)

http://www.cs.umd.edu/~capveg/optack/optack-extended.pdf
x_refsource_MISC
http://www.kb.cert.org/vuls/id/102014
third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/15468/
vdb-entryx_refsource_BID
https://exchange.xforce.ibmcloud.com/vulnerabilities/23055
vdb-entryx_refsource_XF

Link	Providers	Tags
http://www.cs.umd.edu/~capveg/optack/optack-extended.pdf		x_refsource_MISC
http://www.kb.cert.org/vuls/id/102014		third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/15468/		vdb-entryx_refsource_BID
https://exchange.xforce.ibmcloud.com/vulnerabilities/23055		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Nov 18, 2005

Updated Aug 7, 2024

Reserved Nov 18, 2005

Link CVE-2005-3675

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2005-3675

Red Hat

Severity n/a

Public date n/a

Links CVE-2005-3675