CVE-2026-103393 — MEDIUM (4.3)

Vulnerability Description

An Out-of-Bounds Read vulnerability in the VRRP implementation in Juniper Networks Session Smart Router allows an L2-adjacent attacker to read stale memory contents or cause a system fault via a specially crafted VRRPv3 advertisement.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-125

References

https://supportportal.juniper.net/JSA112183

FAQ

What is CVE-2026-103393?

CVE-2026-103393 is a vulnerability with a CVSS score of 4.3 (MEDIUM). An Out-of-Bounds Read vulnerability in the VRRP implementation in Juniper Networks Session Smart Router allows an L2-adjacent attacker to read stale memory contents or cause a system fault via a speci...

How severe is CVE-2026-103393?

CVE-2026-103393 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-103393?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.