CVE-2025-54083Public exploit

Credential disclosure via extractable firmware secrets

Published Sep 9, 2025 · Updated Sep 12, 2025

Credential exposure in Calix GigaCenter ONT 844E, 844G, 844GE, and 854GE allows physically proximate attackers to recover access credentials. The Quantenna SoC firmware keeps the WPA2 PSK in plaintext in hostapd.conf and weak MD5 hashes for hidden web-app credentials in admin.conf. Exploitation requires extracting SPI flash and its JFFS2 filesystem with physical hardware access; recovered secrets expose Wi-Fi access and the Quantenna administrative interface.

CVSS severity5.1
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential exposure in Calix GigaCenter ONT 844E, 844G, 844GE, and 854GE allows physically proximate attackers to recover access credentials. The Quantenna SoC firmware keeps the WPA2 PSK in plaintext in hostapd.conf and weak MD5 hashes for hidden web-app credentials in admin.conf. Exploitation requires extracting SPI flash and its JFFS2 filesystem with physical hardware access; recovered secrets expose Wi-Fi access and the Quantenna administrative interface.

The record

CVE
CVE-2025-54083
Published
Sep 9, 2025
Updated
Sep 12, 2025
Vendor
Calix
Product
GigaCenter ONT
Classifications
CWE-922, CAPEC-37, T1552.001
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=844E
  2. Affected versionversion=844G
  3. Affected versionversion=844GE
  4. Affected versionversion=854GE

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Calix · GigaCenter ONTversion=844E; version=844G; version=844GE; version=854GE

Published CVSS scores

5.1Fluid AttacksCVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-922Insecure Storage of Sensitive Information
CAPEC-37Retrieve Embedded Sensitive Data
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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