Quick answers
- Is CVE-2026-102053 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-102053 being exploited in the wild.
- How severe is CVE-2026-102053?
- Medium severity, with a CVSS score of 5.3, published 14 October 2026.
- Which products and versions are affected?
- Juniper Networks Junos OS QFX5K-family platforms; Juniper Networks Junos OS Evolved QFX5K-family platforms.
- Is there a fix for CVE-2026-102053?
- 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-2026-102053 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-102053?
- Check whether you run Juniper Networks Junos OS or Juniper Networks Junos OS Evolved at an affected version. 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
The l2ald process in Junos OS and Junos OS Evolved on QFX5K platforms fails to properly release memory during EVPN-VXLAN active-active multihoming route processing, allowing a memory leak that can be triggered by a configured EVPN peer sending specially crafted traffic. An authenticated attacker with EVPN peer access can cause repeated memory exhaustion leading to denial of service through resource depletion.
Affected products
- Juniper Networks Junos OS QFX5K-family platforms
- Juniper Networks Junos OS Evolved QFX5K-family platforms
Timeline
- 2026-10-14: disclosed