What is CVE-2026-48687?

CVE-2026-48687 is a critical-severity vulnerability in Pavel-odintsov Fastnetmon, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-05-26.

How severe is CVE-2026-48687?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Pavel-odintsov Fastnetmon

CVE-2026-48687

FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the Juniper router integration plugin. The _log() function in src/juniper_plugin/fastnetmon_juniper.php (lines 117-118) constructs shell commands…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.005 (67.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Pavel-odintsov Fastnetmon
N/a — versions n/a

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

cve@mitre.org (Product)
cve@mitre.org (Product)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-48687?: CVE-2026-48687 is a critical-severity vulnerability in Pavel-odintsov Fastnetmon, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-05-26.
How severe is CVE-2026-48687?: Critical severity. CVSS v3 base score is 9.8 out of 10.