VDB
CVE-2026-103391
CVE-2026-103391
PUBLISHED
CVSS 5.3 MEDIUM
Reported by juniper · Published October 28, 2026
An Out-of-bounds Write vulnerability in the SSR TCP proxy/optimization path in Juniper Networks Session Smart Router allows an attacker to corrupt forwarded packet data and potentially cause a data-plane crash via a transit TCP packet with a crafted TCP option length.
EPSS 0.21% · 10.8th percentile
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| Session Smart Router | Juniper Networks | 7.2.3, 7.1.7, 7.0.5 |
Risk scores
CVSS 3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Score
0.21%
10.8th percentile
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Juniper Networks | Session Smart Router | 0, 7.1.0, 7.2.0 |
| Juniper Networks | Session Smart Router | 0, 7.1.0, 7.2.0 |
Timeline
- Oct 28, 2026 CVE Published
- Oct 29, 2026 EPSS Score
- Oct 29, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-103391
vulnetix vdb fixes CVE-2026-103391Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-103391/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart