High [CVE-2026-103411] 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
This high-severity Juniper Networks advisory covers CVE-2026-103411 affecting Session Smart Router.
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Summary
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.
- Session Smart Router before 7.0.5
- Session Smart Router 7.1.0 before 7.1.7
- Session Smart Router 7.2.0 before 7.2.3
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
- 7.0.5
- 7.1.7
- 7.2.3
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
Mitigation
Upgrade to a fixed release: 7.0.5, 7.1.7, 7.2.3. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
More Juniper Networks advisories
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- CVE-2026-103409Oct 28, 2026Session Smart Router authentication bypass
- CVE-2026-103408Oct 28, 2026Stack Buffer Overflow vulnerability in the DHCP client in Juniper Networks Session Smart
- CVE-2026-103407Oct 28, 2026Session Smart Router path traversal
- CVE-2026-103405Oct 28, 2026Improper Neutralization of Special Elements in Output Used by a Downstream Component
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