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CVE-2025-54349

32
FAUCET Score

CVE-2025-54349 is a critical heap-based buffer overflow vulnerability (CWE-193) affecting iperf before version 3.19.1, specifically within the iperf_auth.c component due to an off-by-one error. This flaw carries a maximum CVSSv3.1 score of 10.0, indicating a severe impact with network-based exploitation requiring no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While the vulnerability is highly severe and has a high FAUCET Risk Score of 88/100, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

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

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
3.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 7th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (23)

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: 20340-17084Fixed in: 3.17.1-3
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
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportFixed in: iperf3-0:3.5-7.el8_6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceFixed in: iperf3-0:3.5-7.el8_6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsFixed in: iperf3-0:3.5-7.el8_6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceFixed in: iperf3-0:3.5-7.el8_8.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsFixed in: iperf3-0:3.5-7.el8_8.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: iperf3-0:3.9-14.el9_7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsFixed in: iperf3-0:3.9-10.el9_0.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsFixed in: iperf3-0:3.9-10.el9_2.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.4 Extended Update SupportFixed in: iperf3-0:3.9-11.el9_4.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.6 Extended Update SupportFixed in: iperf3-0:3.9-14.el9_6.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: iperf3-0:3.17.1-5.el10_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 10.0 Extended Update SupportFixed in: iperf3-0:3.17.1-4.el10_0.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: iperf3-0:3.5-12.el8_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: iperf3-0:3.5-4.el8_2.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: iperf3-0:3.5-7.el8_4.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnFixed in: iperf3-0:3.5-7.el8_4.2
View patch

Vendor Advisories (2)

microsoft2025-Aug/CVE-2025-54349Moderate

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

Aug 12, 2025
redhatCVE-2025-54349Moderate

iperf3: iperf Heap Buffer Overflow

Aug 3, 2025

References

lists.debian.org / debian-lts-announce/2025/08/msg00020.html
github.com / esnet/iperf/commit/4e5313bab0b9b3fe03513ab54f722c8a3e4b7bdf
Patch
github.com / esnet/iperf/releases/tag/3.19.1
Release Notes