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CVE-2026-103408— Session Smart Router: An attacker-controlled input causes remote code execution when parsing DHCP options

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 DHCP 客户端存在堆栈缓冲区溢出漏洞。该漏洞允许本地网络中的未认证攻击者通过恶意 DHCP 响应实现远程代码执行。

CVSS 8.8 · High

Affected Version Matrix 3

VendorProduct Version RangeStatus
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-2026-103408

Vulnerability Information
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Vulnerability Title
Session Smart Router: An attacker-controlled input causes remote code execution when parsing DHCP options
Source: CVE Program / CVE List V5
Vulnerability Description
A Stack Buffer Overflow vulnerability in the DHCP client in Juniper Networks Session Smart Router allows an unauthenticated attacker on the local network to achieve remote code execution 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:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
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-2026-103408

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III. Intelligence Information for CVE-2026-103408

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Other References for CVE-2026-103408 (1)

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-2026-103407 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-2026-103411 7.1 HIGH Session Smart Router: A malicious DHCP server causes information disclosure and a service
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
Same vendor: Juniper Networks
Same weakness: CWE-121