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TI-2026-16011 Aliases CVE-2026-19745GHSA-693x-w4h4-3ppc

Calix GigaSpire Web Management utilities_configurationsave.cgi denial of service

Priority LOW 24CWE-404Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-404.

Summary

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."

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00471 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CalixGigaSpire26.1.0—No fix listedCNA
  • GigaSpire VendorCalix Affected 26.1.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:calix:gigaspire:*:*:*:*:*:*:*:*——Calix
  • cpe:2.3:a:calix:gigaspire:*:*:*:*:*:*:*:* Versions — — ·Calix

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19745
  2. 2026-10-03 Alias added: GHSA-693x-w4h4-3ppc

References

—

  • TI-2025-06969 Calix GigaCenter ONT - Unauthenticated Telnet CVSS 4.0HIGH 8.7
  • TI-2025-33927 Calix Gigacenter ONT - Command Injection CVSS 4.0HIGH 8.5
  • TI-2025-33926 Calix GigaCenter ONT firmware - Sensitive Information Disclosure CVSS 4.0MEDIUM 5.1
  • TI-2025-33785 Calix GigaCenter ONT (Broadcom SoC) - Excessive Privileges CVSS 4.0HIGH 7.0
  • TI-2025-33784 Calix GigaCenter ONT (Quantenna SoC) - Excessive Privileges CVSS 4.0HIGH 7.0
  • TI-2026-16012 Calix GigaSpire traceroute.cmd denial of service CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences