CVE-2025-7635

HIGH

Calix GigaCenter ONT 844E, 844G, 844GE, 854GE - Unauthenticated Telnet Root Access

Title source: llm
STIX 2.1

Description

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

References (3)

Core 3
Core References
Exploit, Mitigation, Third Party Advisory third-party-advisory
https://fluidattacks.com/advisories/sal
Product product related
https://www.calix.com
Third Party Advisory third-party-advisory
https://revers3everything.com/calix-case-five-0-days-five-cves/

Scores

CVSS v3 7.7
EPSS 0.0027
EPSS Percentile 18.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-306
Status published
Products (5)
calix/calix_gigacenter_ont
calix/calix_gigacenter_ont 844e
calix/calix_gigacenter_ont 844g
calix/calix_gigacenter_ont 844ge
calix/calix_gigacenter_ont 854ge
Published Sep 09, 2025
Tracked Since Feb 18, 2026