How severe is CVE-2025-54349?

CVE-2025-54349 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-54349 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-54349?

CVE-2025-54349 affects Es Iperf3. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-54349?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-54349 have an EU (EUVD) identifier?

Yes. CVE-2025-54349 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23456.

When was CVE-2025-54349 published?

CVE-2025-54349 was published on 2025-08-03 and last updated on 2026-06-17.

CVE-2025-54349

CVE-2025-54349 is a medium-severity vulnerability in Es Iperf3 with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-193.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23456
Weakness: CWE-193
Affected product: Es Iperf3
Published: 2025-08-03
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2025-54349?: In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
How severe is CVE-2025-54349?: CVE-2025-54349 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-54349 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-54349?: CVE-2025-54349 affects Es Iperf3. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-54349?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-54349 have an EU (EUVD) identifier?: Yes. CVE-2025-54349 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23456.
When was CVE-2025-54349 published?: CVE-2025-54349 was published on 2025-08-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:es:iperf3:*:*:*:*:*:*:*:*

More vulnerabilities in Es Iperf3

CVE-2016-4303 — Critical (CVSS 9.8): The parse_string function in cjson.c in the cJSON library mishandles UTF8/16 strings, which allows remote attackers to…
CVE-2025-54351 — High (CVSS 8.9): In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv).
CVE-2024-53580 — High (CVSS 7.5): iperf v3.17.1 was discovered to contain a segmentation violation via the iperf_exchange_parameters() function.
CVE-2023-38403 — High (CVSS 7.5): iperf3 before 3.14 allows peers to cause an integer overflow and heap corruption via a crafted length field.
CVE-2024-26306 — Medium (CVSS 5.9): iPerf3 before 3.17, when used with OpenSSL before 3.2.0 as a server with RSA authentication, allows a timing side…
CVE-2023-7250 — Medium (CVSS 5.3): A flaw was found in iperf, a utility for testing network performance using TCP, UDP, and SCTP. A malicious or…

All CVEs affecting Es Iperf3 →

Other CWE-193 (Off-by-one Error) vulnerabilities

CVE-2024-10442 — Critical (CVSS 10.0): Off-by-one error vulnerability in the transmission component in Synology Replication Service before 1.0.12-0066,…
CVE-2026-53309 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: ocfs2/dlm: fix off-by-one in dlm_match_regions()…
CVE-2024-38441 — Critical (CVSS 9.8): Netatalk before 3.2.1 has an off-by-one error and resultant heap-based buffer overflow because of setting ibuf[len] to…
CVE-2023-46853 — Critical (CVSS 9.8): In Memcached before 1.6.22, an off-by-one error exists when processing proxy requests in proxy mode, if \n is used…
CVE-2023-38429 — Critical (CVSS 9.8): An issue was discovered in the Linux kernel before 6.3.4. fs/ksmbd/connection.c in ksmbd has an off-by-one error in…
CVE-2022-34970 — Critical (CVSS 9.8): Crow before 1.0+4 has a heap-based buffer overflow via the function qs_parse in query_string.h. On successful…

Browse all CWE-193 (Off-by-one Error) vulnerabilities →