What’s Vulnerable › Vulnerabilities

CVE-2025-7635: Calix GigaCenter ONT - Unauthenticated Telnet

• Severity: high (CVSS 7.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-09-09 · updated 2026-06-17
• Weakness: CWE-306

Description

Unauthenticated Telnet access vulnerability in Calix GigaCenter ONT allows root access.This issue affects GigaCenter ONT: 844E, 844G, 844GE, 854GE.

Affected products

• Calix GigaCenter ONT: 844e, 844g, 844ge, 854ge

References

• https://fluidattacks.com/advisories/sal
• https://revers3everything.com/calix-case-five-0-days-five-cves/
• https://www.calix.com
• https://fluidattacks.com/advisories/sal

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