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No exploitation reportedFix available

CVE-2019-6677

No exploitation reported by the sources we read.

  • Published2019-12-23
  • Fixed in15.0.1.1 · 14.1.2.1 · 14.0.1.1 · 13.1.3.2

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

On BIG-IP versions 15.0.0-15.0.1, 14.1.0-14.1.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, and 12.1.0-12.1.5, under certain conditions when using custom TCP congestion control settings in a TCP profile, TMM stops processing traffic when processed by an iRule.

Timeline

dates in UTC
  1. 2019-12-2317:15CVE 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-2019-6677?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-6677?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
15.0≥ 15.0.0, < 15.0.1.115.0.1.1
14.1≥ 14.1.0, < 14.1.2.114.1.2.1
14.0≥ 14.0.0, < 14.0.1.114.0.1.1
13.1≥ 13.1.0, < 13.1.3.213.1.3.2
12.1≥ 12.1.0, ≤ 12.1.5no fix published
F5 big-ip advanced firewall manager
BranchAffectedFixed in
15.0≥ 15.0.0, < 15.0.1.115.0.1.1
14.1≥ 14.1.0, < 14.1.2.114.1.2.1
14.0≥ 14.0.0, < 14.0.1.114.0.1.1
13.1≥ 13.1.0, < 13.1.3.213.1.3.2
12.1≥ 12.1.0, ≤ 12.1.5no fix published
F5 big-ip analytics
BranchAffectedFixed in
15.0≥ 15.0.0, < 15.0.1.115.0.1.1
14.1≥ 14.1.0, < 14.1.2.114.1.2.1
14.0≥ 14.0.0, < 14.0.1.114.0.1.1
13.1≥ 13.1.0, < 13.1.3.213.1.3.2
12.1≥ 12.1.0, ≤ 12.1.5no fix published

8 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

  1. Update F5 big-ip access policy manager to 15.0.1.1 · 14.1.2.1 · 14.0.1.1 · 13.1.3.2

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 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • FIRST EPSSEPSS score1.0 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2019-12-23
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2019-6677?

On BIG-IP versions 15.0.0-15.0.1, 14.1.0-14.1.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, and 12.1.0-12.1.5, under certain conditions when using custom TCP congestion control settings in a TCP profile, TMM stops processing traffic when processed by an iRule.

Is CVE-2019-6677 actively exploited?

Active exploitation of CVE-2019-6677 has not been confirmed. Its EPSS score was 1.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-6677?

CVE-2019-6677 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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