CVE-2026-2061VulnerabilityPublished 6 Feb 2026Updated 23 Feb 2026

CVE-2026-2061: D-Link DIR-823X · OS Command Injection

Affects D-Link DIR-823XSource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

5.1Medium

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

EPSS: 5.1% chance of exploitation in 30 days – higher than 92% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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: High
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: 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: 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 6 Feb 2026
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-LinkDIR-823X	Affected =250416	Fixed in–

AI-suggested

1. Immediately restrict remote management access to the D-Link DIR-823X routers by disabling WAN-side administration or limiting it to trusted IP addresses. 2. Implement network segmentation to isolate vulnerable routers from critical internal systems, reducing the potential impact of compromise. 3. Monitor network traffic for unusual or suspicious requests targeting the /goform/set_ipv6 endpoint or other router management interfaces. 4. Apply firmware updates from D-Link as soon as they become available to address this vulnerability. 5. If patches are not yet available, consider temporary workarounds such as firewall rules blocking access to the vulnerable endpoint or disabling IPv6 configuration features if feasible. 6. Conduct regular security audits and vulnerability scans on network devices to identify and remediate similar issues proactively. 7. Educate network administrators about the risks of exposed management interfaces and the importance of secure configuration practices. 8. Employ intrusion detection/prevention systems (IDS/IPS) capable of detecting command injection attempts targeting router management interfaces.

Description

A vulnerability was determined in D-Link DIR-823X 250416. Affected by this issue is the function sub_424D20 of the file /goform/set_ipv6. Executing a manipulation can lead to os command injection. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized.

Impact

The exploitation of CVE-2026-2061 could allow remote attackers to execute arbitrary OS commands on affected D-Link DIR-823X routers, potentially leading to unauthorized control over the device. This could result in disruption of network services, interception or manipulation of network traffic, and use of the compromised router as a foothold for further attacks within the internal network. The impact on confidentiality includes potential exposure of sensitive network configuration and traffic data. Integrity could be compromised by unauthorized changes to device settings or firmware. Availability may be affected if attackers disrupt router functionality or cause denial of service. While the vulnerability requires high privileges, the absence of authentication and user interaction requirements lowers the barrier for exploitation. Organizations relying on these routers for critical network infrastructure may face operational disruptions and increased risk of lateral movement by attackers. The medium severity rating reflects a moderate but significant risk, especially in environments where these devices are widely deployed without adequate network segmentation or monitoring.

Summary

CVE-2026-2061 is a remote OS command injection vulnerability identified in the D-Link DIR-823X router, firmware version 250416. The vulnerability resides in the function sub_424D20 within the /goform/set_ipv6 endpoint, which improperly sanitizes user input, allowing attackers to inject and execute arbitrary OS commands remotely. This flaw does not require user interaction or authentication, making it particularly dangerous as it can be exploited over the network without credentials. The vulnerability has been assigned a CVSS 4.0 score of 5.1, reflecting medium severity due to the requirement of high privileges (PR:H) but no user interaction or authentication. The impact on confidentiality, integrity, and availability is limited but non-negligible, as attackers could potentially manipulate device settings, disrupt network operations, or pivot to internal networks. Although no known exploits are currently active in the wild, the public disclosure increases the likelihood of exploitation attempts. The lack of available patches at the time of disclosure necessitates immediate mitigation measures to reduce exposure. This vulnerability highlights the importance of secure input validation and access controls in embedded device firmware, especially for network infrastructure components like routers.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 23 Feb 2026, 22:08 UTC

Technical details

References

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