CVE-2025-9157: appneta tcpreplay · Use After Free
Affects appneta tcpreplaySource CVE Database V5
Public exploit available · CVSS 4.8 Medium.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% 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:PExploitation evidence
Disclosed: evidence found.
CVE published 19 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| appneta tcpreplay | Affected
| Fixed in– |
AI-suggested
Specific mitigation steps include: 1) Immediate application of the patch identified by commit 73008f261f1cdf7a1087dc8759115242696d35da to all affected tcpreplay installations, especially those running versions 4.5.2-beta1 and 4.5.2-beta2. 2) Restrict local access to systems running tcpreplay to trusted administrators only, minimizing the risk of exploitation by unauthorized users. 3) Implement strict access controls and monitoring on systems used for network testing to detect any unusual activity that could indicate exploitation attempts. 4) Regularly audit and update network testing tools to stable, non-beta releases to reduce exposure to vulnerabilities common in pre-release software. 5) Incorporate runtime memory protection mechanisms such as Address Space Layout Randomization (ASLR) and stack canaries on hosts running tcpreplay to mitigate exploitation impact. 6) Educate internal teams about the risks of using beta software in production or sensitive environments and encourage timely patch management.
Description
A vulnerability was determined in appneta tcpreplay up to 4.5.2-beta2. The impacted element is the function untrunc_packet of the file src/tcpedit/edit_packet.c of the component tcprewrite. Executing manipulation can lead to use after free. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. This patch is called 73008f261f1cdf7a1087dc8759115242696d35da. Applying a patch is advised to resolve this issue.
References
- vuldb.com (opens in a new tab)
- vuldb.com (opens in a new tab)
- vuldb.com (opens in a new tab)
- github.com/appneta/tcpreplay/issues/970 (opens in a new tab)
- github.com/appneta/tcpreplay/issues/970 (opens in a new tab)
- drive.google.com/file/d/1_aONM_TOF96JbnYviPyZhVk-7HObtX8H/view?usp=sharing (opens in a new tab)
- github.com/appneta/tcpreplay/commit/73008f261f1cdf7a1087dc8759115242696d35da (opens in a new tab)