VulnerabilityPublished 7 Nov 2025

CVE-2025-46413: BUFFALO WSR-1800AX4 · Weak Password Hashing

Affects BUFFALO WSR-1800AX4Source CVE Database V5

Not known to be exploited · CVSS 4.3 Medium : upgrade to 1.09 when convenient.

Data as of 26 Oct 2026, 12:55 UTC

CVSS 3.0 base score

4.3Medium

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

EPSS: 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.09

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector: Adjacent
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: Adjacent: The vulnerable component is bound to the network stack, but the attack is limited at the protocol level to a logically adjacent topology. This can mean an attack must be launched from the same shared physical (e.g., Bluetooth or IEEE 802.11) or logical (e.g., local IP subnet) network, or from within a secure or otherwise limited administrative domain (e.g., MPLS, secure VPN to an administrative network zone).
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 7 Nov 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

Upgrade BUFFALO WSR-1800AX4 to 1.09.

Affected software

Product	Affected	Fixed in
BUFFALO INC. WSR-1800AX4	Affected <1.09	Fixed in 1.09

AI-suggested

Immediately update all BUFFALO WSR-1800AX4 routers to firmware version 1.09 or later to apply the security fix addressing the weak password hashing.
Disable WPS functionality entirely if it is not required, as WPS has historically been a common attack vector.
For environments where WPS must remain enabled, monitor network traffic for unusual authentication attempts or brute-force activity targeting the router.
Implement network segmentation to isolate Wi-Fi networks from sensitive internal systems, minimizing the impact of potential credential compromise.
Enforce strong Wi-Fi password policies and consider using WPA3 where supported to enhance wireless security.
Conduct regular security audits and vulnerability assessments on network infrastructure devices to detect outdated firmware or insecure configurations.
Educate IT staff and users about the risks associated with WPS and the importance of timely patching.

Description

Use of password hash with insufficient computational effort issue exists in BUFFALO Wi-Fi router 'WSR-1800AX4 series'. When WPS is enabled, PIN code and/or Wi-Fi password may be obtained by an attacker.

Impact

For European organizations, this vulnerability could lead to unauthorized access to internal networks via compromised Wi-Fi credentials, potentially exposing sensitive data and internal systems to attackers. While the vulnerability does not directly impact system integrity or availability, the confidentiality breach could facilitate further lateral movement or data exfiltration. Organizations relying on BUFFALO WSR-1800AX4 routers in office or industrial environments may face increased risk, especially if WPS is enabled and firmware is not updated. The risk is heightened in sectors with sensitive information or critical infrastructure, such as finance, healthcare, and manufacturing. Additionally, compromised Wi-Fi access could be used as a foothold for more sophisticated attacks. However, the requirement for network adjacency and the absence of known exploits reduce the immediate threat level. Overall, the vulnerability represents a moderate risk that should be addressed promptly to prevent potential exploitation.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 14 Nov 2025, 10:09 UTC

Technical details

References

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