Local Security Flaw in tcpreplay from Appneta
CVE-2025-9649

4.8MEDIUM

Key Information:

Vendor

Appneta

Status
Tcpreplay
Vendor
CVE Published:
29 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9649?

A security flaw has been identified in Appneta's tcpreplay version 4.5.1, specifically in the calc_sleep_time function located in send_packets.c. This vulnerability allows for a local exploitation due to a divide by zero error, which could lead to unexpected application behavior. A fix has been released in version 4.5.3-beta3, and users are strongly advised to upgrade to mitigate this risk. Public disclosures indicate that the issue has been acknowledged by the vendor, ensuring that upgrading provides a pathway to a secure environment.

Affected Version(s)

tcpreplay 4.5.1

tcpreplay 4.5.3-beta3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-9649 - Proof of Concept

References

https://vuldb.com/?id.321855
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321855
signaturepermissions-required
https://vuldb.com/?submit.630493
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2025-9649 : Local Security Flaw in tcpreplay from Appneta