CVE-2025-13315Public exploitNetwork attack vector

Credential disclosure via unauthenticated alternate RPC route

Published Nov 19, 2025 · Updated Nov 19, 2025

Authentication bypass in Lynx Technology Twonky Server 8.5.2 on Linux and Windows allows remote attackers to read administrator credentials. The /nmc/rpc alternate route dispatches log_getfile without the authentication enforced on the normal /rpc route, returning startup logs containing the administrator username and encrypted password. No account or user interaction is required; this flaw discloses only encrypted credentials, while administrator takeover requires a separate decryption weakness.

CVSS severity9.3
Critical
EPSS probability32.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Lynx Technology Twonky Server 8.5.2 on Linux and Windows allows remote attackers to read administrator credentials. The /nmc/rpc alternate route dispatches log_getfile without the authentication enforced on the normal /rpc route, returning startup logs containing the administrator username and encrypted password. No account or user interaction is required; this flaw discloses only encrypted credentials, while administrator takeover requires a separate decryption weakness.

The record

CVE
CVE-2025-13315
Published
Nov 19, 2025
Updated
Nov 19, 2025
Vendor
Lynx Technology
Product
Twonky Server
Classifications
CWE-420, CAPEC-37, T1552.001
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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3Rapid7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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.

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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-420Unprotected Alternate Channel
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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