CVE-2026-103392 json
Session Smart Router: A SACK option causes out-of-bounds memory access and TCP payload corruption when TCP sequence stitching is enabled
published 12d ago modified 4d ago also EUVD-2026-112224
- cvss
- 4.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 12%
- public exploits
- 0
- none known
Summary
An Out-of-Bounds Write vulnerability in the TCP header processing in Juniper Networks Session Smart Router allows an attacker to corrupt TCP payload data and potentially cause session desynchronization via a transit TCP packet with an oversized SACK option length.
Patch / fix
- Juniper Networks Session Smart Router 7.0.5, 7.1.7, 7.2.3
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4d ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L |
Affected products
- Juniper Networks Session Smart Router
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
supportportal.juniper.net
/JSA112183
vendor-advisory
Sources
- CVE List CVE-2026-103392
- NVD CVE-2026-103392
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