---
id: CVE-2026-19746
title: Calix GigaSpire traceroute.cmd denial of service
summary: >-
  A vulnerability has been found in Calix GigaSpire 26.1.0. The affected element
  is an unknown function of the file traceroute.cmd. The manipulation leads to
  denial of service. The attack may be initiated remotely. The exploit has been
  dis…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'
cvssSource: cna
cwe:
  - CWE-404
vendor: Calix
product: GigaSpire
affected:
  - GigaSpire 26.1.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-13T19:25:19.686869Z'
published: '2026-08-13'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T06:04:51.525Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-19746'
references:
  - url: 'https://vuldb.com/vuln/389484'
    label: VDB-389484 | Calix GigaSpire traceroute.cmd denial of service
  - url: 'https://vuldb.com/vuln/389484/cti'
    label: 'VDB-389484 | CTI Indicators (IOB, IOC, TTP, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-19746'
    label: CVE-2026-19746 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/868299'
    label: 'Submit #868299 | Calix GigaSpire (BLAST series) 26.1.0 Denial of Service'
tags:
  - cve.org
epss: 0.00471
epssPercentile: 0.39241
ingestedAt: '2026-10-16T07:01:11.484Z'
---

## Overview

A vulnerability has been found in Calix GigaSpire 26.1.0. The affected element is an unknown function of the file traceroute.cmd. The manipulation leads to denial of service. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The presence of this vulnerability remains uncertain at this time. The vendor explains: "After reviewing the researcher's videos, we repeated the test using his described setup: the traceroute cancel request was sent while a second client was connected to the EWI. The second client remained connected and was not interrupted, and we did not observe a forced logout, session invalidation, or loss of EWI availability."

## Affected

- `GigaSpire 26.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.