CVE-2025-10440VulnerabilityPublished 15 Sep 2025

CVE-2025-10440: D-Link DI-8100 · OS Command Injection

Affects D-Link DI-8100Source CVE Database V5

Not known to be exploited · 13% EPSS · CVSS 5.3 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

5.3Medium

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

EPSS: 13.7% chance of exploitation in 30 days – higher than 96% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: Low
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: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
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: 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: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to 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 15 Sep 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 2026-10-25.

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 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
D-Link DI-8100	Affected =16.07.26 =17.12.20 =19.12.10	Fixed in–

AI-suggested

1. Immediate network segmentation: Isolate affected D-Link devices from critical network segments to limit potential lateral movement if compromised. 2. Disable remote management interfaces on affected routers unless absolutely necessary, reducing the attack surface. 3. Implement strict firewall rules to restrict access to router management ports (typically HTTP/HTTPS) to trusted internal IP addresses only. 4. Monitor network traffic for unusual or suspicious HTTP requests targeting the usb_paswd.asp endpoint or containing suspicious 'hname' parameters. 5. Employ intrusion detection/prevention systems (IDS/IPS) with updated signatures to detect attempts to exploit this command injection. 6. 7. As a longer-term measure, consider replacing affected devices with models from vendors with stronger security track records and active patch support. 8. Educate IT staff about this vulnerability and ensure incident response plans include steps for potential exploitation scenarios involving network infrastructure devices.

Description

A vulnerability has been found in D-Link DI-8100, DI-8100G, DI-8200, DI-8200G, DI-8003 and DI-8003G 16.07.26A1/17.12.20A1/19.12.10A1. Affected by this vulnerability is the function sub_4621DC of the file usb_paswd.asp of the component jhttpd. The manipulation of the argument hname leads to os command injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Impact

For European organizations, this vulnerability poses a moderate risk, especially for those relying on the affected D-Link router models in their network infrastructure. Successful exploitation could allow attackers to execute arbitrary commands on the routers, potentially leading to unauthorized access to internal networks, interception or manipulation of network traffic, or disruption of network services. This could impact confidentiality by exposing sensitive data traversing the network, integrity by altering configurations or data, and availability by causing device crashes or network outages. Organizations in sectors with critical infrastructure or sensitive data, such as finance, healthcare, and government, may face heightened risks. Additionally, the remote and unauthenticated nature of the exploit increases the likelihood of automated attacks targeting exposed devices. Given the widespread use of D-Link networking equipment in small and medium enterprises across Europe, the vulnerability could be leveraged in targeted or opportunistic attacks, especially if attackers combine it with other vulnerabilities or social engineering tactics.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 16 Sep 2025, 00:29 UTC

Technical details

References

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