CVE-2020-27720: f5 big-ip_carrier-grade_nat
Vulnerability summary
CVE-2020-27720 is a high (CVSS 7.5) vulnerability in f5 big-ip_carrier-grade_nat. EPSS estimates a 1.44% chance of exploitation in the next 30 days, higher than 72.9% of scored vulnerabilities.
Timeline
- 24-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
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 metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.44%
Chance of exploitation in the next 30 days
Percentile
73%
Versus all other CVEs
30-day change
0.00 pp
From 1.44% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
F52 products
- big-ip_carrier-grade_nat≥ 13.1.0, ≤ 13.1.3 | ≥ 14.1.0, < 14.1.3.1 | ≥ 15.1.0, < 15.1.1 | ≥ 16.0.0, < 16.0.1
- big-ip_local_traffic_manager≥ 13.1.0, ≤ 13.1.3 | ≥ 14.1.0, < 14.1.3.1 | ≥ 15.1.0, < 15.1.1 | ≥ 16.0.0, < 16.0.1
1 vendor · 2 products