CVE-2025-7635— Calix GigaCenter ONT - Unauthenticated Telnet
Quick assessment
Affected
Calix GigaCenter ONT
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Calix GigaCenter ONT Series是美国Calix公司的一系列光网络终端。 Calix GigaCenter ONT Series存在访问控制错误漏洞，该漏洞源于未经验证的Telnet访问，可能导致获取root权限。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-7635
Vulnerability Information
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Vulnerability Title
Calix GigaCenter ONT - Unauthenticated Telnet
Source: CVE Program / CVE List V5
Vulnerability Description
Unauthenticated Telnet access vulnerability in Calix GigaCenter ONT allows root access.This issue affects GigaCenter ONT: 844E, 844G, 844GE, 854GE.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Calix GigaCenter ONT Series 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Calix GigaCenter ONT Series是美国Calix公司的一系列光网络终端。 Calix GigaCenter ONT Series存在访问控制错误漏洞，该漏洞源于未经验证的Telnet访问，可能导致获取root权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Calix | GigaCenter ONT | 844E | - |
|
II. Public POCs for CVE-2025-7635
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2025-7635 (1)
-
🔗 Calix GigaCenter ONT - Unauthenticated Telnet | Fluid Attacks Read full article third-party-advisory
Same Patch Batch · Calix · 2025-09-09 · 5 CVEs total
| CVE-2025-54083 | Calix GigaCenter ONT firmware - Sensitive Information Disclosure | |
| CVE-2025-54084 | Calix Gigacenter ONT - Command Injection | |
| CVE-2025-53914 | Calix GigaCenter ONT (Broadcom SoC) - Excessive Privileges | |
| CVE-2025-53913 | Calix GigaCenter ONT (Quantenna SoC) - Excessive Privileges |
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Same product: GigaCenter ONT
Same vendor: Calix
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V. Comments for CVE-2025-7635
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