No exploitation reported

CVE-2015-8240

No exploitation reported by the sources we read.

Published2016-04-11
WeaknessCWE-19

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The Traffic Management Microkernel (TMM) in F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, GTM, Link Controller, and BIG-IP PEM before 11.4.1 HF10, 11.5.x before 11.5.4, and 11.6.x before 11.6.0 HF6 and BIG-IP PSM before 11.4.1 HF10 does not properly handle TCP options, which allows remote attackers to cause a denial of service via unspecified vectors, related to the tm.minpathmtu database variable.

Timeline

dates in UTC

2016-04-1114:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-8240?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-8240?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

F5 big-ip access policy manager

Branch	Affected	Fixed in	Source
11.4	= 11.4.1	no fix published	NVD
11.5	= 11.5.3	no fix published	NVD
11.6	= 11.6.0	no fix published	NVD

F5 big-ip advanced firewall manager

Branch	Affected	Fixed in	Source
11.4	= 11.4.1	no fix published	NVD
11.5	= 11.5.3	no fix published	NVD
11.6	= 11.6.0	no fix published	NVD

F5 big-ip analytics

Branch	Affected	Fixed in	Source
11.4	= 11.4.1	no fix published	NVD
11.5	= 11.5.3	no fix published	NVD
11.6	= 11.6.0	no fix published	NVD

7 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

support.f5.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-19read 2026-10-23
FIRST EPSSEPSS score1.8 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2016-04-11
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2015-8240?

Is CVE-2015-8240 actively exploited?

Active exploitation of CVE-2015-8240 has not been confirmed. Its EPSS score was 1.8% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2015-8240?

CVE-2015-8240 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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