CVE-2025-55584VulnerabilityPublished 18 Aug 2025

CVE-2025-55584: n/a

Source CVE Database V5

Not known to be exploited · CVSS 5.3 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

Organizations and users should immediately verify if they are using the TOTOLINK A3002R router with the affected firmware version. If so, they should disable the telnet service entirely if not required, as telnet is outdated and insecure. If telnet must be used, changing default or insecure credentials to strong, unique passwords is critical. Network segmentation should be employed to isolate vulnerable devices from sensitive internal networks. Monitoring network traffic for unusual telnet connections and implementing firewall rules to block inbound telnet access from untrusted networks can reduce exposure. Users should check for firmware updates from TOTOLINK regularly and apply patches as soon as they become available. Additionally, organizations should educate users about the risks of default credentials and insecure protocols and enforce policies that prohibit their use. Employing network intrusion detection systems (NIDS) to detect telnet-based attacks and unauthorized access attempts can provide early warning.

Description

TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain insecure credentials for the telnet service and root account.

Impact

For European organizations, this vulnerability poses a significant threat, especially for small to medium enterprises and home users relying on TOTOLINK A3002R routers for internet connectivity. Compromise of these routers could lead to unauthorized access to internal networks, data interception, and lateral movement within corporate environments. Critical infrastructure entities or organizations with remote sites using these routers could face operational disruptions or data breaches. The impact extends to privacy violations under GDPR, as unauthorized access to network traffic could expose personal data. Additionally, compromised routers could be co-opted into botnets, contributing to broader cybercrime activities that may indirectly affect European networks. The absence of a patch increases the window of exposure, and the use of telnet, which is often blocked or monitored in corporate environments, may limit exploitation to less secure networks or home offices, but the risk remains substantial given the root-level access potential.

CWE-1391Use of Weak Credentials (opens in a new tab)
Class weaknessOWASP Top 10 A07:2025: Authentication Failures (opens in a new tab)
The product uses weak credentials (such as a default key or hard-coded password) that can be calculated, derived, reused, or guessed by an attacker.
Architecture and Design · Operation
When the user changes or sets a password, check the password against a database of already compromised or breached passwords. These passwords are likely to be used in password guessing attacks.
OWASP Cheat Sheets
OWASP Authentication (opens in a new tab)
OWASP ASVS 4.0.3
V2.8.5 (opens in a new tab)
V2.8.4 (opens in a new tab)
V9.2.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/goldenGlow21/softwares_PoC/blob/main/A3002R_V4/Telnet/PoC.md (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 18 Aug 2025, 19:49 UTC

WeaknessesCWE-1391

Technical details

References

Community reviews

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