Vulnerability in Es Iperf3

CVE-2025-54349

In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.

EPSS: 0.003 (52.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L.

Affected products

Es Iperf3 — versions 0

Weakness classification (CWE)

CWE-193 — Off-by-one Error

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-54349?: CVE-2025-54349 is a medium-severity vulnerability in Es Iperf3, classified under Off-by-one Error. CVSS score: 6.5/10. Published 2025-08-03.
How severe is CVE-2025-54349?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-54349 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.