Vulnerability · Published Oct 28, 2026 · Assigned by juniper
CVE-2026-103393Session Smart Router: An attacker can cause an out-of-bounds read during VRRP packet processing
Medium 4.3
In plain English
A medium-severity out-of-bounds read in Session Smart Router from Juniper Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 95.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Juniper Networks | Session Smart Router | 0 – before 7.0.57.1.0 – before 7.1.77.2.0 – before 7.2.3 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://supportportal.juniper.net/JSA112183 vendor-advisory