What’s Vulnerable › Vulnerabilities

CVE-2025-54349

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-03 · updated 2026-06-17
• Weakness: CWE-193

Description

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

Affected products

• ES iperf3: from 3.2 before 3.19.1 — fixed in 3.19.1

How to fix

Upgrade to a fixed version: ES iperf3 3.19.1. Check the vendor advisory for mitigations.

References

• https://github.com/esnet/iperf/commit/4e5313bab0b9b3fe03513ab54f722c8a3e4b7bdf
• https://github.com/esnet/iperf/releases/tag/3.19.1
• https://lists.debian.org/debian-lts-announce/2025/08/msg00020.html

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