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CVE-2025-54351

35
FAUCET Score

CVE-2025-54351 is a critical buffer overflow vulnerability affecting iperf3 versions prior to 3.19.1, specifically when the --skip-rx-copy option is utilized. This flaw, rated with a CVSS score of 10.0, allows unauthenticated remote attackers to achieve complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation, exploit code, or Metasploit/Nuclei modules available, the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation. Organizations using affected iperf3 versions should upgrade to 3.19.1 immediately and consider restricting access to mitigate this severe risk.

Impacted Technologies

VendorProductVersion(s)CPE
3.19CPE matchmatch criteria
cpe:2.3:a:es:iperf3:3.19:*:*:*:*:*:*:*
>= 0, < 3.19.1CPE match
cpe:2.3:a:es:iperf3:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.9HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.3%
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 9th percentile among its peer group of 36,897 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 (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (2)

microsoft2025-Aug/CVE-2025-54351

In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv).

Aug 12, 2025
redhatCVE-2025-54351Important

iperf3: iperf Buffer Overflow

Aug 3, 2025

References

github.com / esnet/iperf/commit/969b7f70c447513e92c9798f22e82b40ebc53bf0
Patch
github.com / esnet/iperf/releases/tag/3.19.1
Release Notes