Quick answers
- Is CVE-2026-102178 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-102178 being exploited in the wild.
- How severe is CVE-2026-102178?
- Critical severity, with a CVSS score of 9.8, published 14 October 2026.
- Which products and versions are affected?
- Juniper Networks Junos OS; Juniper Networks Junos OS Evolved.
- Is there a fix for CVE-2026-102178?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-102178 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-102178?
- Check whether you run Juniper Networks Junos OS or Juniper Networks Junos OS Evolved. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stack-based buffer overflow exists in the BGP routing daemon when processing flowspec route re-advertisements. The vulnerability requires an attacker to be a configured BGP flowspec peer and requires BGP update-threading to be enabled. Successful exploitation can lead to routing-engine compromise or denial of service of the routing daemon.
Affected products
- Juniper Networks Junos OS
- Juniper Networks Junos OS Evolved
Timeline
- 2026-10-14: disclosed