Skip to content
Noroxi
NVD / CVE Program· CNA mitre

CVE-2025-54349: In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.

CriticalCVSS 10.0 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Plan (action score 40/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.46% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: azl3 iperf3 3.17.1-3 on Azure Linux 3.0 3.17.1-3; cbl2 iperf3 3.18-1 on CBL Mariner 2.0 3.18-2; cbl2 iperf3 3.18-2 on CBL Mariner 2.0 3.18-2.
  • Severity is disputed: the assigning authority (CNA) scores it 6.5, NVD 10.0.

Add it to your regular patch cycle. Upgrade to azl3 iperf3 3.17.1-3 on Azure Linux 3.0 3.17.1-3; cbl2 iperf3 3.18-1 on CBL Mariner 2.0 3.18-2; cbl2 iperf3 3.18-2 on CBL Mariner 2.0 3.18-2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Published
Aug 2, 2025
Updated
Jun 17, 2026
EPSS
0.4% · 40th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
40 / 40 · 10.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
10.0
CNA · mitre
6.5
3.5 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-54349

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for es records
Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
esiperf3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mitre). Independent of NVD's CPE analysis and usually ahead of it.

  • ES iperf3

    • before 3.19.1affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • es iperf33.2 and later · before 3.19.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10iperf3before 3.17.1-5.el10_13.17.1-5.el10_1
AlmaLinux:8iperf3before 3.5-12.el8_103.5-12.el8_10
AlmaLinux:9iperf3before 3.9-14.el9_7.13.9-14.el9_7.1
Alpine:v3.22iperf3from 3.2 · before 3.19.1-r03.19.1-r0
Debian:11iperf3before 3.9-1+deb11u33.9-1+deb11u3
Debian:12iperf3before 3.12-1+deb12u23.12-1+deb12u2
Debian:13iperf3before 3.18-2+deb13u13.18-2+deb13u1
Debian:14iperf3before 3.19.1-13.19.1-1
openSUSE:Leap 15.6iperfbefore 3.19.1-150000.3.15.13.19.1-150000.3.15.1
openSUSE:Tumbleweediperfbefore 3.19.1-1.13.19.1-1.1
Red Hat:enterprise_linux_eus:10.0iperf3before 0:3.17.1-4.el10_0.10:3.17.1-4.el10_0.1
Red Hat:enterprise_linux_eus:10.0iperf3-debuginfobefore 0:3.17.1-4.el10_0.10:3.17.1-4.el10_0.1
Red Hat:enterprise_linux_eus:10.0iperf3-debugsourcebefore 0:3.17.1-4.el10_0.10:3.17.1-4.el10_0.1
Red Hat:enterprise_linux:10.1iperf3before 0:3.17.1-5.el10_10:3.17.1-5.el10_1
Red Hat:enterprise_linux:10.1iperf3-debuginfobefore 0:3.17.1-5.el10_10:3.17.1-5.el10_1
Red Hat:enterprise_linux:10.1iperf3-debugsourcebefore 0:3.17.1-5.el10_10:3.17.1-5.el10_1
Red Hat:enterprise_linux:8::appstreamiperf3before 0:3.5-12.el8_100:3.5-12.el8_10
Red Hat:enterprise_linux:8::appstreamiperf3-debuginfobefore 0:3.5-12.el8_100:3.5-12.el8_10
Red Hat:enterprise_linux:8::appstreamiperf3-debugsourcebefore 0:3.5-12.el8_100:3.5-12.el8_10
Red Hat:enterprise_linux:9::appstreamiperf3before 0:3.9-14.el9_7.10:3.9-14.el9_7.1
Red Hat:enterprise_linux:9::appstreamiperf3-debuginfobefore 0:3.9-14.el9_7.10:3.9-14.el9_7.1
Red Hat:enterprise_linux:9::appstreamiperf3-debugsourcebefore 0:3.9-14.el9_7.10:3.9-14.el9_7.1
Red Hat:rhel_aus:8.2::appstreamiperf3before 0:3.5-4.el8_2.20:3.5-4.el8_2.2
Red Hat:rhel_aus:8.2::appstreamiperf3-debuginfobefore 0:3.5-4.el8_2.20:3.5-4.el8_2.2

+26

Same product

es: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-4303The parse_string function in cjson.c in the cJSON library mishandles UTF8/16 strings, which allows remote attackers to cause a denial of…
    41Plan
  • CVE-2025-54351In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv).
    40Plan
  • CVE-2023-38403iperf3 before 3.14 allows peers to cause an integer overflow and heap corruption via a crafted length field.
    31Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2024-26306May 14, 2024 · iPerf3 before 3.17, when used with OpenSSL before 3.2.0 as a server with RSA authentication, allows a timing side channel in RSA decryption…
    23Monitor
  • ← EarlierCVE-2024-53580Dec 18, 2024 · iperf v3.17.1 was discovered to contain a segmentation violation via the iperf_exchange_parameters() function.
    30Monitor
  • Later →CVE-2025-54350Aug 2, 2025 · In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 iperf3 3.17.1-3 on Azure Linux 3.03.17.1-3 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 iperf3 3.18-1 on CBL Mariner 2.03.18-2 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 iperf3 3.18-2 on CBL Mariner 2.03.18-2 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:iperf33.5-12.el8_10 · AlmaLinux:8Package registry (OSV)
alpine:iperf33.19.1-r0 · Alpine:v3.22Package registry (OSV)
debian:iperf33.12-1+deb12u2 · Debian:12Package registry (OSV)
opensuse:iperf3.19.1-150000.3.15.1 · openSUSE:Leap 15.6Package registry (OSV)
red hat:iperf30:3.5-12.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:iperf3-debuginfo0:3.5-12.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:iperf3-debugsource0:3.5-12.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:iperf30:3.5-12.el8_10 · Rocky Linux:8Package registry (OSV)
suse:iperf3.19.1-150000.3.15.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP6Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-193 · Off-by-one Error

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records