CVE-2025-13316Public exploitNetwork attack vector

Administrator takeover via hard-coded Blowfish keys

Published Nov 19, 2025 · Updated Nov 19, 2025

Hard-coded keys in Twonky Server 8.5.2 on Linux and Windows allow attackers to recover the administrator password. The enc_passwd routine selects one of 12 Blowfish keys embedded in the executable, prefixes the key index to the ciphertext, and stores the result in the configuration file. An encrypted password value is required; decrypting it yields the plaintext credential and administrator access to the server and its stored media.

CVSS severity8.2
High
EPSS probability2.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded keys in Twonky Server 8.5.2 on Linux and Windows allow attackers to recover the administrator password. The enc_passwd routine selects one of 12 Blowfish keys embedded in the executable, prefixes the key index to the ciphertext, and stores the result in the configuration file. An encrypted password value is required; decrypting it yields the plaintext credential and administrator access to the server and its stored media.

The record

CVE
CVE-2025-13316
Published
Nov 19, 2025
Updated
Nov 19, 2025
Vendor
Lynx Technology
Product
Twonky Server
Classifications
CWE-321, T1140
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 19, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=8.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Lynx Technology · Twonky Serverversion=8.5.2

Published CVSS scores

8.2Rapid7, Inc.CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
8.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-321Use of Hard-coded Cryptographic Key
T1140Deobfuscate/Decode Files or Information

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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