CVE-2025-55901Public exploit

Unauthenticated command execution via host_time injection

Published Dec 15, 2025 · Updated Dec 15, 2025

Command injection in NTPSyncWithHost in TOTOLINK A3300R 17.0.0cu.596_B20250515 allows attackers to execute commands via host_time. NTPSyncWithHost processes the attacker-controlled host_time value as command input without neutralizing command syntax. Access from an adjacent network requires no authentication or user interaction and permits unauthorized modification of router state, with no reported ability to read data or interrupt service.

CVSS severity6.5
Medium
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in NTPSyncWithHost in TOTOLINK A3300R 17.0.0cu.596_B20250515 allows attackers to execute commands via host_time. NTPSyncWithHost processes the attacker-controlled host_time value as command input without neutralizing command syntax. Access from an adjacent network requires no authentication or user interaction and permits unauthorized modification of router state, with no reported ability to read data or interrupt service.

The record

CVE
CVE-2025-55901
Published
Dec 15, 2025
Updated
Dec 15, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 15, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A: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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

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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