What is CVE-2020-23273?

CVE-2020-23273 is a medium-severity vulnerability in Broadcom Tcpreplay, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2021-09-22.

How severe is CVE-2020-23273?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Broadcom Tcpreplay

CVE-2020-23273

Heap-buffer overflow in the randomize_iparp function in edit_packet.c. of Tcpreplay v4.3.2 allows attackers to cause a denial of service (DOS) via a crafted pcap.

Vulnerability class: Buffer Overflow

Published 2021-09-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (49.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000

Affected products

Broadcom Tcpreplay — versions 4.3.2

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/appneta/tcpreplay/issues/579 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-23273?: CVE-2020-23273 is a medium-severity vulnerability in Broadcom Tcpreplay, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2021-09-22.
How severe is CVE-2020-23273?: Medium severity. CVSS v3 base score is 5.5 out of 10.