CVE-2020-27720

mediumpriority · track · 31EPSS 0.014 · 73 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.44% (73rd) EPSS

CVSS 4.3 · medium

Is it mine?

9 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

On BIG-IP LTM/CGNAT version 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, and 13.1.0-13.1.3.5, when processing NAT66 traffic with Port Block Allocation (PBA) mode and SP-DAG enabled, and dag-ipv6-prefix-len configured with a value less than the default of 128, an undisclosed traffic pattern may cause the Traffic Management Microkernel (TMM) to restart.

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 · 4.3–7.5

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-362USLLM-inferredCWE-400USLLM-inferred

affected products (9)

Products and version ranges known to be affected.

n/a BIG-IP LTM/CGNAT≤ 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.5enisa_euvdEU
f5 big-ip carrier-grade nat13.1.0 → 13.1.3nvdUScpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*
f5 big-ip carrier-grade nat14.1.0 → 14.1.3.1nvdUScpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*
f5 big-ip carrier-grade nat15.1.0 → 15.1.1nvdUScpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*
f5 big-ip carrier-grade nat16.0.0 → 16.0.1nvdUScpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*
f5 big-ip local traffic manager13.1.0 → 13.1.3nvdUScpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
f5 big-ip local traffic manager14.1.0 → 14.1.3.1nvdUScpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
f5 big-ip local traffic manager15.1.0 → 15.1.1nvdUScpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
f5 big-ip local traffic manager16.0.0 → 16.0.1nvdUScpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2020-12-24modified 2026-06-17

references (6)

External citations — patches, advisories, analysis.

scry

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