CVE-2026-19745

MediumCVSS 4.3

Published: 13/08/2026(UTC)Updated: 16/10/2026(UTC)Translated: 16/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.47%

39th percentile - higher than 39% of all known CVEs

Summary

A flaw has been found in Calix GigaSpire 26.1.0 in an unknown function of the file utilities_configurationsave.cgi of the Web Management Interface component. Manipulation of the sessionKey argument can lead to denial of service. The attack can be launched remotely, and the exploit has been published. The existence of this vulnerability is currently disputed by the vendor, who states the observed delay is due to expected input-timeout handling rather than a crash.

Risk Assessment

A potential attacker could remotely cause a denial of service, disrupting the availability of the management interface. Due to the dispute with the vendor, the actual risk requires further verification.

Recommendation

Monitor official Calix advisories regarding this vulnerability and apply available updates if needed. Restrict access to the management interface from untrusted networks.

Other vulnerabilities in Calix GigaSpire

CVE-2026-19746Medium
A vulnerability has been found in Calix GigaSpire 26.1.0 in an unknown function of the file traceroute.cmd, leading to denial of service. The attack can be launched remotely, and the exploit has been publicly disclosed. The existence of this vulnerability is currently uncertain, as the vendor states they did not observe session interruption or loss of EWI availability during testing.

Original NVD description (English source)

A flaw has been found in Calix GigaSpire 26.1.0. Impacted is an unknown function of the file utilities_configurationsave.cgi of the component Web Management Interface. Executing a manipulation of the argument sessionKey can lead to denial of service. The attack can be launched remotely. The exploit has been published and may be used. The existence of this vulnerability is still disputed at present. The vendor explains: "We reproduced the reported request pattern. The observed delay results from expected input-timeout handling while the handler waits for input data. We did not observe a backend crash, resource exhaustion, service instability, or loss of EWI availability, and the interface remained accessible during and after testing."

Vulnerability data from NVD (NIST) · CISA KEV · EPSS