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VulnerabilityPublished Updated

CVE-2025-9386: appneta tcpreplay · Use After Free

Affects appneta tcpreplaySource CVE Database V5

0

Public exploit available · CVSS 4.8 Medium.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 4.0 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Aug 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
appneta tcpreplayAffected
  • =4.5.0
  • =4.5.1
Fixed in–

AI-suggested

European organizations should prioritize upgrading tcpreplay to version 4.5.2-beta3 or later to remediate this vulnerability. Beyond patching, organizations should enforce strict access controls to limit local access to systems running tcpreplay, ensuring only trusted administrators and users have permissions. Implementing robust endpoint security solutions that monitor for anomalous local activity can help detect exploitation attempts. Network segmentation can isolate systems used for network testing to reduce the risk of lateral movement if an attacker gains local access. Additionally, organizations should audit and monitor usage of tcpreplay, verifying that it is only installed where necessary and that its use complies with security policies. Regular vulnerability scanning and patch management processes should be maintained to detect and remediate similar issues promptly. Finally, training and awareness for system administrators about the risks of local vulnerabilities and the importance of least privilege principles will further reduce exploitation likelihood.

Description

A vulnerability has been found in appneta tcpreplay up to 4.5.1. The impacted element is the function get_l2len_protocol of the file get.c of the component tcprewrite. Such manipulation leads to use after free. The attack must be carried out locally. The exploit has been disclosed to the public and may be used. Upgrading to version 4.5.2-beta3 is sufficient to resolve this issue. You should upgrade the affected component.

References

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