CVE-2025-13316: Twonky Server 8.5.2 on Linux and Windows is vulnerable to a cryptographic flaw, use of hard-coded cryptographi

This week

HIGH 8.1REMOTEWATCHLISTDOWNGRADE

CVE-2025-13316 is a high-severity flaw (CVSS 8.1) affecting twonky server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Twonky Server 8.5.2 on Linux and Windows is vulnerable to a cryptographic flaw, use of hard-coded cryptographic keys. An attacker with knowledge of the encrypted administrator password can decrypt the value with static keys to view the plain text password and gain administrator-level access to Twonky Server.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.8% (top 14%)
CISA exploited list	No
Weakness	CWE-321
Published	2025-11-19
Last modified	2026-10-18

Publisher (CNA): Rapid7, Inc. · Vendor: lynxtechnology

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-19 18:15 UTCPublished CVE record published
2026-10-18 20:10 UTCUpdated Record last modified

lynxtechnology twonky server DOWNGRADE

Affected: 8.5.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.5.2

1. Check installed version

apt-cache policy twonky-server || rpm -q twonky-server || twonky-server --version

2. No fixed release: DOWNGRADE to a release before 8.5.2 (Debian / Ubuntu)

apt-cache madison twonky-server sudo apt install twonky-server=<VERSION_BEFORE_8.5.2> sudo apt-mark hold twonky-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list twonky-server sudo dnf downgrade twonky-server-<VERSION_BEFORE_8.5.2> sudo dnf versionlock add twonky-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora ELN · openjpeg · FIXED · 2.5.4-5.eln159 · FEDORA-2026-1a5f60f401 · source

sudo dnf upgrade --advisory=FEDORA-2026-1a5f60f401

Fedora 46 · trustedqsl · FIXED · 2.8.7-1.fc46 · FEDORA-2026-6b1bc90ebc · source

sudo dnf upgrade --advisory=FEDORA-2026-6b1bc90ebc

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.rapid7.com/blog/post/cve-2025-13315-cve-2025-13316-critical-twonky-server-authenticati
Metasploit: Twonky Server Log Leak Authentication Bypass

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-13316?

twonky server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-13316 being exploited?

CVE-2025-13316 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-13316 affect?

CVE-2025-13316 affects twonky server. Severity is high (CVSS 8.1). Twonky Server 8.5.2 on Linux and Windows is vulnerable to a cryptographic flaw, use of hard-coded cryptographic keys. An attacker with knowledge of the encrypted administrator password can decrypt the value with static keys to view the plai

How urgent is CVE-2025-13316?

Priority 65/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Windows vulnerabilities

Related CVEs

CVE-2025-13315 CRITICAL 9.8 DOWNGRADE Twonky Server 8.5.2 on Linux and Windows is vulnerable to an access control flaw

References

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