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No exploitation reported

CVE-2016-5736

No exploitation reported by the sources we read.

  • Published2016-08-19
  • WeaknessCWE-284

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 default configuration of the IPsec IKE peer listener in F5 BIG-IP LTM, Analytics, APM, ASM, and Link Controller 11.2.1 before HF16, 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.x before 12.0.0 HF2; BIG-IP AAM, AFM, and PEM 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.x before 12.0.0 HF2; BIG-IP DNS 12.x before 12.0.0 HF2; BIG-IP Edge Gateway, WebAccelerator, and WOM 11.2.1 before HF16; BIG-IP GTM 11.2.1 before HF16, 11.4.x, 11.5.x before 11.5.4 HF2, and 11.6.x before 11.6.1; and BIG-IP PSM 11.4.0 through 11.4.1 improperly enables the anonymous IPsec IKE peer configuration object, which allows remote attackers to establish an IKE Phase 1 negotiation and possibly conduct brute-force attacks against Phase 2 negotiations via unspecified vectors.

Timeline

dates in UTC
  1. 2016-08-1921:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 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-2016-5736?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-5736?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
BranchAffectedFixed in
11.2= 11.2.1no fix published
11.4= 11.4.0no fix published
11.4= 11.4.1no fix published
11.5= 11.5.0no fix published
11.5= 11.5.1no fix published
11.5= 11.5.2no fix published
11.5= 11.5.3no fix published
11.5= 11.5.4no fix published
11.6= 11.6.0no fix published
12.0= 12.0.0no fix published
F5 big-ip analytics
BranchAffectedFixed in
11.2= 11.2.1no fix published
11.4= 11.4.0no fix published
11.4= 11.4.1no fix published
11.5= 11.5.0no fix published
11.5= 11.5.1no fix published
11.5= 11.5.2no fix published
11.5= 11.5.3no fix published
11.5= 11.5.4no fix published
11.6= 11.6.0no fix published
12.0= 12.0.0no fix published
F5 big-ip application security manager
BranchAffectedFixed in
11.2= 11.2.1no fix published
11.4= 11.4.0no fix published
11.4= 11.4.1no fix published
11.5= 11.5.0no fix published
11.5= 11.5.1no fix published
11.5= 11.5.2no fix published
11.5= 11.5.3no fix published
11.5= 11.5.4no fix published
11.6= 11.6.0no fix published
12.0= 12.0.0no fix published

12 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

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.07.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-284read 2026-10-23
  • FIRST EPSSEPSS score2.3 %2026-10-22

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
2016-08-19
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2016-5736?

The default configuration of the IPsec IKE peer listener in F5 BIG-IP LTM, Analytics, APM, ASM, and Link Controller 11.2.1 before HF16, 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.x before 12.0.0 HF2; BIG-IP AAM, AFM, and PEM 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.x before 12.0.0 HF2; BIG-IP DNS 12.x before 12.0.0 HF2; BIG-IP Edge Gateway, WebAccelerator, and WOM 11.2.1 before HF16; BIG-IP GTM 11.2.1 before HF16, 11.4.x, 11.5.x before 11.5.4 HF2, and 11.6.x before 11.6.1; and BIG-IP PSM 11.4.0 through 11.4.1 improperly enables the anonymous IPsec IKE peer configuration object, which allows remote attackers to establish an IKE Phase 1 negotiation and possibly conduct brute-force attacks against Phase 2 negotiations via unspecified vectors.

Is CVE-2016-5736 actively exploited?

Active exploitation of CVE-2016-5736 has not been confirmed. Its EPSS score was 2.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-5736?

CVE-2016-5736 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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