VulnerabilityPublished 3 Jun 2025

CVE-2025-5508: 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, 10:12 UTC

CVSS 4.0 base score

4.8Medium

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 34% 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
GitHubtotolink/A3002RU`pkg:github/totolink/A3002RU`Other threats	Affected =2.1.1-B20230720.1011	Fixed in–

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AI-suggested

Organizations should immediately identify and inventory all TOTOLINK A3002RU routers running the affected firmware version 2.1.1-B20230720.1011. Disable remote management features if enabled. Implement strict network segmentation to limit the impact of a compromised router. Educate users and administrators about phishing risks and the need to avoid interacting with suspicious links or pages that could trigger the XSS attack. Monitor network traffic and router logs for unusual activity indicative of exploitation attempts. Consider replacing affected devices with models from vendors with active security support if feasible. Additionally, deploy web application firewalls (WAFs) or intrusion prevention systems (IPS) capable of detecting and blocking XSS payloads targeting router interfaces.

Description

A vulnerability was found in TOTOLINK A3002RU 2.1.1-B20230720.1011. It has been rated as problematic. Affected by this issue is some unknown functionality of the component IP Port Filtering Page. The manipulation of the argument Comment leads to cross site scripting. The attack may be launched 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, the impact of CVE-2025-5508 depends on the deployment scale of the TOTOLINK A3002RU router. If used in enterprise or critical infrastructure environments, exploitation could compromise network perimeter security by enabling attackers to execute scripts that hijack administrative sessions or alter router configurations. This could lead to unauthorized access, data leakage, or network disruptions. Small and medium-sized enterprises (SMEs) and home offices using this router model may be particularly vulnerable due to less rigorous network security controls. The vulnerability’s requirement for user interaction means phishing or social engineering could be leveraged to trigger the attack, increasing risk in environments with less security awareness. Although no active exploits are known, the public disclosure and lack of vendor response increase the risk of future exploitation. The vulnerability could also undermine trust in network devices and complicate compliance with European data protection regulations such as GDPR if personal data is exposed or network integrity is compromised.

Summary

CVE-2025-5508 is a cross-site scripting (XSS) vulnerability identified in the TOTOLINK A3002RU router, specifically in version 2.1.1-B20230720.1011. The vulnerability resides in the IP Port Filtering Page component, where improper sanitization of the 'Comment' argument allows an attacker to inject malicious scripts. This flaw can be exploited remotely without authentication, requiring only user interaction to trigger the malicious payload. The vulnerability is rated with a CVSS 4.8 (medium severity) score, reflecting moderate impact and ease of exploitation. The vendor has been notified but has not responded or issued a patch, and no known exploits are currently observed in the wild. The attack vector is network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:H indicates high privileges required, but the vector states no privileges, so there is a discrepancy; based on CVSS vector PR:H means privileges required), and user interaction is necessary (UI:P). The vulnerability impacts confidentiality and integrity to a limited extent, with no direct impact on availability. Exploiting this vulnerability could allow attackers to execute arbitrary scripts in the context of the router's web interface, potentially leading to session hijacking, unauthorized configuration changes, or further network compromise if the attacker can lure an authenticated user to a malicious page or link. Given the router’s role as a network gateway device, successful exploitation could facilitate lateral movement or data interception within affected networks.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 11 Jul 2025, 06:19 UTC

Technical details

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