VulnerabilityPublished 9 Jun 2025

CVE-2025-5900: Tenda AC9 · Cross-Site Request Forgery

Affects Tenda AC9Source CVE Database V5

Public exploit available · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score

5.3Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
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

Threat metrics

Exploit Maturity: POC

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: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
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.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Jun 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
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), CVSS vector, 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
Tenda AC9	Affected =15.03.02.13	Fixed in–

AI-suggested

Immediate mitigation should focus on network segmentation and restricting access to the router's web management interface from untrusted networks, including disabling remote management if enabled.
Users should avoid visiting untrusted websites or clicking suspicious links while connected to networks using vulnerable Tenda AC9 routers.
Monitor network traffic for unusual configuration changes or DNS redirection that could indicate exploitation attempts.
Implement Content Security Policy (CSP) and SameSite cookie attributes on internal web interfaces where possible to reduce CSRF risks.
Regularly check for firmware updates from Tenda and apply patches as soon as they become available.
Consider replacing vulnerable devices with models that have robust security controls if patches are delayed.
Educate users about the risks of CSRF and safe browsing practices to reduce the likelihood of successful attacks.
Employ network intrusion detection systems (NIDS) to detect anomalous traffic patterns associated with CSRF exploitation attempts.

Description

A vulnerability, which was classified as problematic, was found in Tenda AC9 15.03.02.13. This affects an unknown part. The manipulation leads to cross-site request forgery. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Impact

For European organizations, especially small and medium enterprises (SMEs) and home office users relying on Tenda AC9 routers, this vulnerability poses a moderate risk. Successful exploitation could allow attackers to manipulate router configurations remotely, potentially redirecting traffic to malicious sites, intercepting sensitive data, or disrupting network connectivity. This can lead to data leakage, man-in-the-middle attacks, or denial of service conditions impacting business operations. Since the vulnerability does not require authentication or user interaction beyond visiting a malicious webpage, it lowers the barrier for exploitation. European organizations with remote or hybrid work setups using vulnerable Tenda AC9 devices may face increased exposure. Additionally, critical infrastructure or organizations with less mature network security practices could be targeted for espionage or sabotage. However, the absence of known exploits in the wild and the medium severity rating suggest the threat is currently moderate but warrants proactive mitigation to prevent escalation.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 11 Jul 2025, 00:04 UTC

Technical details

References

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