What is CVE-2026-48696?

CVE-2026-48696 is a medium-severity vulnerability in Pavel-Odintsov Fastnetmon, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.2/10. Published 2026-05-26.

How severe is CVE-2026-48696?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Buffer overflow in Pavel-Odintsov Fastnetmon

CVE-2026-48696

FastNetMon Community Edition through 1.2.9 has a buffer overflow, a different vulnerability than CVE-2026-48686 and CVE-2026-48689.

Vulnerability class: Buffer Overflow

Published 2026-05-26 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (6.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.3% 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: 0.002 · change: +0.001

Affected products

Pavel-Odintsov Fastnetmon

Weakness classification (CWE)

References

github.com/pavel-odintsov/fastnetmon (Product)
lorikeetsecurity.com/blog/fastnetmon-cve-2026-48696-exabgp-sprintf-overflow (Third Party Advisory)

Frequently asked questions

What is CVE-2026-48696?: CVE-2026-48696 is a medium-severity vulnerability in Pavel-Odintsov Fastnetmon, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.2/10. Published 2026-05-26.
How severe is CVE-2026-48696?: Medium severity. CVSS v3 base score is 6.2 out of 10.