CVE-2026-102012: CWE-617 Reachable Assertion in Juniper Networks Junos OS Evolved
Description
CVE-2026-102012 is a reachable assertion vulnerability in the na-grpcd process of Juniper Networks Junos OS Evolved. This flaw allows a remote unauthenticated attacker to cause a denial of service (DoS) by sending a specially crafted gRPC telemetry subscription request. The vulnerability affects multiple versions of Junos OS Evolved prior to certain fixed releases. The CVSS v3.1 score is 7.5, indicating high severity due to the potential for service disruption without requiring authentication.
CVSS v3.1
Score 7.5high
Affected software
Juniper Networks
Junos OS Evolved
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-102012) involves a reachable assertion failure in the na-grpcd process of Juniper Networks Junos OS Evolved. An unauthenticated remote attacker can exploit this by sending a crafted gRPC telemetry subscription request, which triggers the assertion and causes the process to crash, resulting in a denial of service. The vulnerability affects various versions of Junos OS Evolved prior to specific patch releases as enumerated in the affectedVersions field. There is no indication of confidentiality or integrity impact, only availability is affected.
Potential Impact
The impact is a denial of service condition caused by crashing the na-grpcd process, which handles gRPC telemetry subscriptions. This can disrupt telemetry data collection and potentially affect network monitoring and management functions relying on this process. No confidentiality or integrity impacts are reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patch links are provided in the input data. Until a patch is available, consider restricting access to the gRPC telemetry service from untrusted networks to reduce exposure to unauthenticated remote attacks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-09-28T17:33:49.409Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acfb6722cdf04f65697950d
Added to database: 10/14/2026, 17:05:54 UTC
Last enriched: 10/14/2026, 17:20:06 UTC
Last updated: 10/14/2026, 19:00:32 UTC
Views: 3
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