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CVE-2025-54350

21
FAUCET Score

CVE-2025-54350 is a medium-severity assertion failure vulnerability affecting iperf3 versions prior to 3.19.1. A remote, unauthenticated attacker can trigger an application exit in iperf_auth.c by sending a malformed authentication attempt, leading to a denial of service. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.2, < 3.19.1CPE matchmatch criteria
cpe:2.3:a:es:iperf3:*:*:*:*:*:*:*:*
>= 0, < 3.19.1CPE match
cpe:2.3:a:es:iperf3:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 20th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (11)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: cbl2 iperf3 3.18-2 on CBL Mariner 2.0Fixed in: 3.18-2
microsoftpatch availablevia msrc
Product: 20101-17086Fixed in: 3.18-2
microsoftpatch availablevia msrc
Product: 20398-17086Fixed in: 3.18-2
microsoftpatch availablevia msrc
Product: azl3 iperf3 3.17.1-3 on Azure Linux 3.0Fixed in: 3.17.1-3
microsoftpatch availablevia msrc
Product: cbl2 iperf3 3.18-1 on CBL Mariner 2.0Fixed in: 3.18-2
microsoftpatch availablevia msrc
Product: 20340-17084Fixed in: 3.17.1-3
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: iperf3
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: iperf3
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: iperf3
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: iperf3

Vendor Advisories (2)

microsoft2025-Aug/CVE-2025-54350Low

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

Aug 12, 2025
redhatCVE-2025-54350Low

iperf3: iperf Authentication Decode Failure

Aug 3, 2025

References

lists.debian.org / debian-lts-announce/2025/08/msg00020.html
github.com / esnet/iperf/commit/4eab661da0bbaac04493fa40164e928c6df7934a
Patch
github.com / esnet/iperf/releases/tag/3.19.1
Release Notes