VulnerabilityPublished 3 Jun 2025

CVE-2025-5506: TOTOLINK A3002RU · Cross-site Scripting

Affects TOTOLINK A3002RUSource CVE Database V5

Not known to be exploited · CVSS 4.8 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score

4.8Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: High
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

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

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, 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: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: High: The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Jun 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 26 Oct 2026.

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 or the CVSS exploit maturity 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

Affected software

Product	Affected	Fixed in
TOTOLINK A3002RU	Affected =2.1.1-B20230720.1011	Fixed in–

AI-suggested

Immediate mitigation should include disabling remote web management interfaces on TOTOLINK A3002RU routers to reduce exposure to remote attacks.
Network administrators should implement strict access controls and firewall rules to limit access to the router's management interface to trusted internal IP addresses only.
Employ network segmentation to isolate management interfaces from general user networks, minimizing the risk of internal exploitation.
Monitor network traffic and logs for unusual access patterns or suspicious requests targeting the NAT Mapping Page or the 'Comment' parameter.
Educate users and administrators about phishing risks and the importance of not clicking on suspicious links that could trigger the XSS payload.
Regularly check for vendor updates or community patches and apply them promptly once available.
Consider replacing affected devices with models from vendors with active security support if patching is not forthcoming.
Use web application firewalls (WAF) or intrusion prevention systems (IPS) capable of detecting and blocking XSS attack patterns targeting router management interfaces.

Description

A vulnerability was found in TOTOLINK A3002RU 2.1.1-B20230720.1011. It has been classified as problematic. Affected is an unknown function of the component NAT Mapping Page. The manipulation of the argument Comment leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations, this vulnerability poses a moderate risk primarily to network infrastructure security. TOTOLINK routers, including the A3002RU model, are used in small to medium business environments and residential settings across Europe. Exploitation could allow attackers to hijack administrative sessions or manipulate router configurations, potentially leading to network traffic interception, redirection, or persistent unauthorized access. This could compromise internal network confidentiality and integrity, especially in organizations relying on these routers for perimeter defense or VPN termination. Although the vulnerability does not directly impact availability, the indirect effects of compromised network devices could disrupt business operations. The absence of a patch and vendor communication increases exposure, particularly for organizations with limited network segmentation or monitoring. Additionally, the requirement for user interaction means phishing or social engineering campaigns could be leveraged to trigger the exploit, increasing the attack surface. European organizations with remote management enabled on these devices are at higher risk, as attackers can launch the attack over the internet.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 11 Jul 2025, 06:18 UTC

Technical details

References

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