Calix GigaSpire 26.1.0 traceroute.cmd denial of service ⚔ [Disputed]

Summaryinfo

A vulnerability was found in Calix GigaSpire 26.1.0 and classified as problematic. The impacted element is an unknown function of the file traceroute.cmd. The manipulation results in denial of service. This vulnerability is cataloged as CVE-2026-19746. The attack may be launched remotely. Furthermore, there is an exploit available. There are still doubts about whether this vulnerability truly exists. 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."

Detailsinfo

A vulnerability classified as problematic has been found in Calix GigaSpire 26.1.0. Affected is an unknown code of the file traceroute.cmd. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

This vulnerability is traded as CVE-2026-19746. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1499.

It is declared as proof-of-concept. The real existence of this vulnerability is still doubted at the moment. 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."

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-58225). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Calix

Name

• GigaSpire

Version

• 26.1.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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CVSSv3info

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Submitinfo

Accepted

• Submit #868299: Calix GigaSpire (BLAST series) 26.1.0 Denial of Service (by calix.com)

Once again VulDB remains the best source for vulnerability data.

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