VulnerabilityPublished 2 Sep 2025

CVE-2025-9806: Tenda F1202 · Hard-coded Credentials

Affects Tenda F1202Source CVE Database V5

Public exploit available · CVSS 1.8 Low.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score

1.8Low

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

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

Attack Vector: Local
Attack Complexity: High
Attack Requirements: None
Privileges Required: High
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: None
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: Local: The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
Attack Complexity: High: The successful attack depends on the evasion or circumvention of security-enhancing techniques in place that would otherwise hinder the attack. These include: Evasion of exploit mitigation techniques, for example, circumvention of address space randomization (ASLR) or data execution prevention (DEP) must be performed for the attack to be successful; Obtaining target-specific secrets. The attacker must gather some target-specific secret before the attack can be successful. A secret is any piece of information that cannot be obtained through any amount of reconnaissance. To obtain the secret the attacker must perform additional attacks or break otherwise secure measures (e.g. knowledge of a secret key may be needed to break a crypto channel). This operation must be performed for each attacked target.
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: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system 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 Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within 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 2 Sep 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 F1202	Affected =1.2.0.9 =1.2.0.14 =1.2.0.20	Fixed in–

AI-suggested

Physical and Network Access Controls: Restrict physical access to Tenda F1202 devices and ensure that local network segments containing these routers are secured and segmented to limit unauthorized local access.
Firmware Updates and Vendor Communication: Although no patches are currently linked, organizations should monitor Tenda's official channels for firmware updates addressing this vulnerability and apply them promptly once available.
Device Replacement or Hardening: Consider replacing affected Tenda F1202 devices with models that do not have known hard-coded credential issues or that support stronger authentication mechanisms.
Administrative Access Monitoring: Implement logging and monitoring of administrative access attempts on these routers to detect unusual or unauthorized access patterns.
Network Segmentation: Isolate management interfaces from general user networks to reduce the risk of local exploitation.
Incident Response Preparedness: Prepare to respond to potential insider threats or local attacks by having clear procedures for investigating suspicious router access or configuration changes.
Vendor Engagement: Engage with Tenda support to request information on mitigation plans or interim workarounds such as disabling vulnerable interfaces or changing default credentials if possible.

Description

A vulnerability was determined in Tenda F1202 1.2.0.9/1.2.0.14/1.2.0.20. Impacted is an unknown function of the file /etc_ro/shadow of the component Administrative Interface. This manipulation with the input Fireitup causes hard-coded credentials. The attack can only be executed locally. A high degree of complexity is needed for the attack. The exploitability is considered difficult. The exploit has been publicly disclosed and may be utilized.

Impact

For European organizations, the direct impact of CVE-2025-9806 is relatively limited due to the low severity and the constraints on exploitation. The vulnerability requires local access to the device and high privileges, which reduces the likelihood of remote or large-scale exploitation. However, in environments where physical or local network access to Tenda F1202 routers is possible—such as branch offices, small business locations, or less secure network segments—an attacker with insider access or who has compromised a local machine could leverage this vulnerability to gain administrative control over the router. This could lead to unauthorized configuration changes, interception or redirection of network traffic, or establishing persistence within the network. Given that routers are critical infrastructure components, any unauthorized administrative access can have cascading effects on network security and availability. European organizations using Tenda F1202 devices should be aware of this risk, especially in scenarios where physical security is weaker or where local network segmentation is insufficient. The low CVSS score and difficulty of exploitation mean that this vulnerability is unlikely to be a primary attack vector but could be leveraged in multi-stage attacks or insider threat scenarios.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 2 Sep 2025, 01:02 UTC

Technical details

References

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