What is CVE-2025-9157?

CVE-2025-9157 is a medium-severity vulnerability in Appneta Tcpreplay, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-08-19.

How severe is CVE-2025-9157?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2025-9157 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Appneta Tcpreplay

CVE-2025-9157

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.

Vulnerability class: Buffer Overflow

Published 2025-08-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.001 (3.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Appneta Tcpreplay — versions 4.5.2-beta1, 4.5.2-beta2

Weakness classification (CWE)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

vuldb.com/ (technical-description, vdb-entry)
vuldb.com/ (signature, permissions-required)
vuldb.com/ (third-party-advisory)
github.com/appneta/tcpreplay/issues/970 (issue-tracking)
github.com/appneta/tcpreplay/issues/970 (issue-tracking)
drive.google.com/file/d/1_aONM_TOF96JbnYviPyZhVk-7HObtX8H/view (exploit)
github.com/appneta/tcpreplay/commit/73008f261f1cdf7a1087dc8759115242696d35da (patch)

Frequently asked questions

What is CVE-2025-9157?: CVE-2025-9157 is a medium-severity vulnerability in Appneta Tcpreplay, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-08-19.
How severe is CVE-2025-9157?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2025-9157 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.