# CVE-2025-9649: tcpreplay: A security vulnerability has been detected in appneta tcpreplay 4.5.1

CVE-2025-9649 is fixed in tcpreplay on 1 platform, first by DEBIAN-CVE-2025-9649, released August 29, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-9649
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 29, 2025

## Description

A security vulnerability has been detected in appneta tcpreplay 4.5.1. Impacted is the function calc_sleep_time of the file send_packets.c. Such manipulation leads to divide by zero. An attack has to be approached locally. The exploit has been disclosed publicly and may be used. Upgrading to version 4.5.3-beta3 is recommended to address this issue. It is advisable to upgrade the affected component. The vendor confirms in a GitHub issue reply: "Was able to reproduce in 6fcbf03 but NOT 4.5.3-beta3."

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tcpreplay Debian 14 | 4.5.2-1 | [DEBIAN-CVE-2025-9649](https://patchblox.com/security/data/fix/linux/debian-cve-2025-9649.md) | Aug 29, 2025 |
| Linux | tcpreplay opensuse-leap 16.0 | 4.5.2-bp160.1.1 | [OPENSUSE-SU-2025:20119-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20119-1.md) | Nov 27, 2025 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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