# ESnet Iperf3 vulnerabilities

Source: https://junglewise.ai/threats/technologies/esnet-iperf3  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/esnet-iperf3.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in ESnet Iperf3: 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-101283, was published on 30 September 2026. Nothing in the last four weeks, down from 3 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 3
- All time: 3 (0 critical, 0 exploited in the wild)

## About ESnet Iperf3

Network performance measurement tool that measures maximum TCP and UDP bandwidth between two systems.

## Latest ESnet Iperf3 vulnerabilities

- [CVE-2026-101283: iperf3 heap buffer overflow in RSA decryption](https://junglewise.ai/threats/cve-2026-101283-iperf3-3-20-3-21-esnet-iperf-has-a-pre-auth-heap-buffer-overflow) (info, published 30 Sep 2026)
- [CVE-2026-101276: iperf3 heap use-after-free in server watchdog timer](https://junglewise.ai/threats/cve-2026-101276-iperf3-3-21-esnet-iperf-contains-a-remote-unauthenticated-heap) (info, published 30 Sep 2026)
- [CVE-2026-102253: iperf3 denial of service in UDP receive worker](https://junglewise.ai/threats/cve-2026-102253-iperf3-versions-prior-to-3-22-contains-a-denial-of-service) (high, CVSS 7.5, published 29 Sep 2026)

## Most severe ESnet Iperf3 vulnerabilities

- [CVE-2026-102253: iperf3 denial of service in UDP receive worker](https://junglewise.ai/threats/cve-2026-102253-iperf3-versions-prior-to-3-22-contains-a-denial-of-service) (high, CVSS 7.5, published 29 Sep 2026)
- [CVE-2026-101283: iperf3 heap buffer overflow in RSA decryption](https://junglewise.ai/threats/cve-2026-101283-iperf3-3-20-3-21-esnet-iperf-has-a-pre-auth-heap-buffer-overflow) (info, published 30 Sep 2026)
- [CVE-2026-101276: iperf3 heap use-after-free in server watchdog timer](https://junglewise.ai/threats/cve-2026-101276-iperf3-3-21-esnet-iperf-contains-a-remote-unauthenticated-heap) (info, published 30 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 3 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 3 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "ESnet Iperf3 vulnerabilities", https://junglewise.ai/threats/technologies/esnet-iperf3, 9 November 2026.