VulnerabilityPublished 24 Mar 2026

CVE-2026-4627: D-Link DIR-825 · OS Command Injection

Affects D-Link DIR-825Source CVE Database V5

Not known to be exploited · CVSS 8.6 High · end of life, no fix coming : replace or isolate D-Link DIR-825; no fix will be released.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 4.0 base score

8.6High

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

EPSS: 2.0% chance of exploitation in 30 days – higher than 81% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: None coming – the product is end of life

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

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: High
User Interaction: None
Vulnerable system confidentiality: High
Vulnerable system integrity: High
Vulnerable system availability: High
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: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: High: There is a total loss of confidentiality, resulting in all information within the Vulnerable System being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.
Vulnerable system integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the vulnerable system. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the vulnerable system.
Vulnerable system availability: High: There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the Vulnerable System; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the Vulnerable System (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).
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 24 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 29 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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

No fix will be released: D-Link DIR-825 is end of life. Replace it, or isolate it from untrusted networks until you can.

Affected software

Product	Affected	Fixed in
D-LinkDIR-825	Affected =1.0.5 =4.5.1	Fixed in–
D-LinkDIR-825R	Affected =1.0.5 =4.5.1	Fixed in–

AI-suggested

Given the lack of official patches for this vulnerability, organizations should prioritize the following mitigation strategies: 1) Immediate replacement of affected D-Link DIR-825 and DIR-825R devices with supported models that receive regular security updates. 2) If replacement is not immediately feasible, isolate the vulnerable devices by placing them behind additional network segmentation or firewalls to restrict access to trusted management networks only. 3) Disable or restrict NTP service functionality on the affected devices if possible, to reduce the attack surface. 4) Monitor network traffic for unusual activity indicative of exploitation attempts, such as unexpected command execution or anomalous NTP requests. 5) Implement strict access controls and multi-factor authentication on network management interfaces to prevent unauthorized privilege escalation. 6) Regularly audit and inventory network devices to identify unsupported hardware and plan for timely upgrades. 7) Employ intrusion detection and prevention systems capable of detecting command injection patterns targeting network devices. These steps collectively reduce the risk of exploitation while organizations transition away from vulnerable hardware.

Description

A vulnerability was found in D-Link DIR-825 and DIR-825R 1.0.5/4.5.1. Affected is the function handler_update_system_time of the file libdeuteron_modules.so of the component NTP Service. The manipulation results in os command injection. The attack may be launched remotely. This vulnerability only affects products that are no longer supported by the maintainer.

Impact

The impact of CVE-2026-4627 is significant for organizations still using the affected D-Link DIR-825 and DIR-825R routers. Successful exploitation can lead to arbitrary code execution at the operating system level, allowing attackers to take full control of the device. This can result in unauthorized access to internal networks, interception or manipulation of network traffic, and potential pivoting to other critical systems. The compromise of network routers can severely affect confidentiality, integrity, and availability of organizational data and services. Since these devices often serve as gateways or critical network infrastructure components, their compromise could lead to widespread network outages or facilitate further attacks such as man-in-the-middle, data exfiltration, or deployment of malware. The absence of vendor support and patches exacerbates the risk, as organizations cannot rely on official fixes and must seek alternative mitigation strategies. This vulnerability poses a particular threat to small and medium enterprises or home users who may continue to use legacy hardware without adequate security controls.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 24 Mar 2026, 04:46 UTC

Technical details

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