Juniper Junos OS up to 23.2R2-S4/23.4R2-S4/24.2R2-S1/24.4R1 SSL plugin input validation

Summaryinfo

A vulnerability described as critical has been identified in Juniper Junos OS up to 23.2R2-S4/23.4R2-S4/24.2R2-S1/24.4R1. Affected by this issue is some unknown functionality of the component SSL plugin. Executing a manipulation can lead to input validation. The identification of this vulnerability is CVE-2026-102082. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Juniper Junos OS up to 23.2R2-S4/23.4R2-S4/24.2R2-S1/24.4R1 and classified as critical. This vulnerability affects an unknown code block of the component SSL plugin. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

An Improper Handling of Missing Special Element vulnerability in the SSL plugin of Juniper Networks Junos OS on SRX Series allows a network-based, unauthenticated attacker to cause a Denial-of-Service (DoS). This issue is will occur when 'ssl-proxy' is configured on SRX platforms and during a TLS session-resumption attempt a specifically malformed TLS message is received. This results in an invalid pointer access and PFE crash which causes a temporary loss of traffic forwarding until the PFE automatically recovers. The exact internal timing to trigger this issue is outside the attacker's direct control.This issue affects Junos OS on SRX Series: * All versions before 23.2R2-S5; * 23.4 versions before 23.4R2-S5; * 24.2 versions before 24.2R2-S2; * 24.4 versions before 24.4R2.

The advisory is shared for download at supportportal.juniper.net. This vulnerability was named CVE-2026-102082 since 09/28/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/14/2026).

Upgrading to version 23.2R2-S5, 23.4R2-S5, 24.2R2-S2 or 24.4R2 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS

Version

• 23.2R2-S4
• 23.4R2-S4
• 24.2R2-S1
• 24.4R1

License

• commercial

Website

• Vendor: https://www.juniper.net/

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