CVE-2025-7635 — HIGH (7.7) — White Hats Nepal

Vulnerability Description

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

CVSS Score

7.7

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Calix	Calix Gigacenter Ont	All versions

Related Weaknesses (CWE)

CWE-306

References

https://fluidattacks.com/advisories/salExploitMitigationThird Party Advisory
https://revers3everything.com/calix-case-five-0-days-five-cves/Third Party Advisory
https://www.calix.comProduct
https://fluidattacks.com/advisories/salExploitMitigationThird Party Advisory

FAQ

What is CVE-2025-7635?

CVE-2025-7635 is a vulnerability with a CVSS score of 7.7 (HIGH). Unauthenticated Telnet access vulnerability in Calix GigaCenter ONT allows root access.This issue affects GigaCenter ONT: 844E, 844G, 844GE, 854GE.

How severe is CVE-2025-7635?

CVE-2025-7635 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-7635?

Check the references section above for vendor advisories and patch information. Affected products include: Calix Calix Gigacenter Ont.