CVE-2026-103411— Session Smart Router: A malicious DHCP server causes information disclosure and a service crash during DHCP option parsing
Quick assessment
Affected
Juniper Networks Session Smart Router
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Juniper Networks Session Smart Router 中的 DhcpMessageDecoder 组件存在整数下溢漏洞。拥有本地网络访问权限的攻击者可利用恶意 DHCP 响应，导致信息泄露和拒绝服务（DoS）。
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1499 · Endpoint Denial of ServiceAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Juniper Networks | Session Smart Router | < 7.0.5 |
affected |
7.1.0< 7.1.7 |
affected | ||
7.2.0< 7.2.3 |
affected |
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I. Basic Information for CVE-2026-103411
Vulnerability Information
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Vulnerability Title
Session Smart Router: A malicious DHCP server causes information disclosure and a service crash during DHCP option parsing
Source: CVE Program / CVE List V5
Vulnerability Description
An Integer Underflow vulnerability in DhcpMessageDecoder in Juniper Networks Session Smart Router allows an attacker with local network access to cause information disclosure and a denial of service via a malicious DHCP reply.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Juniper Networks | Session Smart Router | 0 ~ 7.0.5 | - |
|
II. Public POCs for CVE-2026-103411
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-103411 (1)
-
https://supportportal.juniper.net/JSA112183 vendor-advisory
Same Patch Batch · Juniper Networks · 2026-10-28 · 18 CVEs total
| CVE-2026-103409 | 9.8 CRITICAL | Session Smart Router: An attacker obtains administrative privileges when an unauthenticate |
| CVE-2026-103406 | 9.8 CRITICAL | Session Smart Conductor: An unauthenticated attacker causes arbitrary command execution du |
| CVE-2026-106079 | 8.8 HIGH | Session Smart Router and Session Smart Conductor: Improper validation of a field causes pr |
| CVE-2026-103408 | 8.8 HIGH | Session Smart Router: An attacker-controlled input causes remote code execution when parsi |
| CVE-2026-103407 | 8.8 HIGH | Session Smart Router and Session Smart Conductor: Unsanitized input allows arbitrary file |
| CVE-2026-103401 | 8.8 HIGH | Session Smart Router and Session Smart Conductor: An attacker can overwrite arbitrary file |
| CVE-2026-103402 | 8.8 HIGH | Session Smart Router and Session Smart Conductor: Lack of integrity verification in cache |
| CVE-2026-103403 | 8.8 HIGH | Session Smart Router and Session Smart Conductor: Unvalidated input causes arbitrary file |
| CVE-2026-103410 | 7.5 HIGH | Session Smart Router: Integer overflow causes denial of service during TLS certificate ins |
| CVE-2026-103404 | 6.8 MEDIUM | Session Smart Conductor: Insecure file permissions cause unauthorized access to sensitive |
| CVE-2026-103405 | 5.8 MEDIUM | Session Smart Router and Session Smart Conductor: Unsanitized input causes HTTP response s |
| CVE-2026-103400 | 5.5 MEDIUM | Session Smart Router and Session Smart Conductor: Crafted directory names cause arbitrary |
| CVE-2026-103391 | 5.3 MEDIUM | Session Smart Router: An attacker-controlled TCP option causes an out-of-bounds write when |
| CVE-2026-103390 | 5.3 MEDIUM | Session Smart Router and Session Smart Conductor: A malformed HTTP URI causes a service cr |
| CVE-2026-103392 | 4.8 MEDIUM | Session Smart Router: A SACK option causes out-of-bounds memory access and TCP payload cor |
| CVE-2026-103393 | 4.3 MEDIUM | Session Smart Router: An attacker can cause an out-of-bounds read during VRRP packet proce |
| CVE-2026-103394 | 3.7 LOW | Session Smart Router: An incomplete operator causes the use of incorrect encryption keys d |
IV. Related Vulnerabilities
Same product: Session Smart Router
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CVE-2026-106079
Session Smart Router and Session Smart Conductor: Improper v -
CVE-2026-103410
Session Smart Router: Integer overflow causes denial of serv -
CVE-2026-103409
Session Smart Router: An attacker obtains administrative pri -
CVE-2026-103408
Session Smart Router: An attacker-controlled input causes re -
CVE-2026-103407
Session Smart Router and Session Smart Conductor: Unsanitize
Same vendor: Juniper Networks
-
CVE-2026-106079
Session Smart Router and Session Smart Conductor: Improper v -
CVE-2026-103410
Session Smart Router: Integer overflow causes denial of serv -
CVE-2026-103409
Session Smart Router: An attacker obtains administrative pri -
CVE-2026-103408
Session Smart Router: An attacker-controlled input causes re -
CVE-2026-103407
Session Smart Router and Session Smart Conductor: Unsanitize
Same weakness: CWE-191
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