What is CVE-2025-52952?

CVE-2025-52952 is a medium-severity vulnerability in Juniper 2x100ge_\+_4x10ge_mpc5e, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2025-07-11.

How severe is CVE-2025-52952?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Juniper 2x100ge_\+_4x10ge_mpc5e

CVE-2025-52952

An Out-of-bounds Write vulnerability in the connectivity fault management (CFM) daemon of Juniper Networks Junos OS on MX Series with MPC-BUILTIN, MPC1 through MPC9 line cards allows an unauthenticated adjacent attacker to send a malformed…

Vulnerability class: Buffer Overflow

EPSS: 0.003 (19.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

sirt@juniper.net (vendor-advisory, Vendor Advisory)
sirt@juniper.net (Product, technical-description)

Frequently asked questions

What is CVE-2025-52952?: CVE-2025-52952 is a medium-severity vulnerability in Juniper 2x100ge_\+_4x10ge_mpc5e, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2025-07-11.
How severe is CVE-2025-52952?: Medium severity. CVSS v3 base score is 6.5 out of 10.