CVE-2025-13562VulnerabilityPublished 23 Nov 2025

CVE-2025-13562: D-Link DIR-852 · Command Injection

Affects D-Link DIR-852Source CVE Database V5

Not known to be exploited · CVSS 6.9 Medium · end of life, no fix coming : replace or isolate D-Link DIR-852; no fix will be released.

Data as of 26 Oct 2026, 08:30 UTC

CVSS 4.0 base score

6.9Medium

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

EPSS: 6.2% chance of exploitation in 30 days – higher than 93% 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:N/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: None
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: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
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 23 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 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-852 is end of life. Replace it, or isolate it from untrusted networks until you can.

Affected software

Product	Affected	Fixed in
D-Link DIR-852	Affected =1.00	Fixed in–

AI-suggested

Given the absence of official patches, European organizations should prioritize replacing the affected D-Link DIR-852 routers with supported and updated models. Network administrators should immediately disable remote management interfaces and restrict access to router management ports to trusted internal networks only. Implement network segmentation to isolate vulnerable devices from critical infrastructure and sensitive data environments. Employ intrusion detection and prevention systems (IDS/IPS) to monitor for suspicious traffic targeting the /gena.cgi endpoint or unusual command execution patterns. Regularly audit network devices for outdated firmware and unsupported hardware to proactively identify and remediate risks. Educate users about the risks of using end-of-life network equipment and encourage timely hardware upgrades. If replacement is not immediately feasible, consider deploying firewall rules to block incoming traffic to the vulnerable CGI endpoint and limit exposure to untrusted networks. Maintain up-to-date network monitoring and incident response plans to quickly detect and respond to potential exploitation attempts.

Description

A vulnerability was identified in D-Link DIR-852 1.00. This issue affects some unknown processing of the file /gena.cgi. Such manipulation of the argument service leads to command injection. The attack can be executed remotely. The exploit is publicly available and might be used. This vulnerability only affects products that are no longer supported by the maintainer.

Impact

For European organizations, the primary impact of this vulnerability lies in the potential compromise of network perimeter devices that use the D-Link DIR-852 router. Attackers gaining control over these routers can intercept or redirect network traffic, launch further attacks against internal systems, or use the device as a foothold for lateral movement. This can lead to data breaches, disruption of network services, and loss of confidentiality and integrity of communications. Small and medium enterprises (SMEs) and home office setups, which often rely on consumer-grade routers like the DIR-852, are particularly at risk. The lack of vendor support and patches means that vulnerable devices will remain exposed unless proactively replaced or mitigated. Additionally, compromised routers can be conscripted into botnets or used for distributed denial-of-service (DDoS) attacks, affecting broader network stability. The medium severity rating suggests that while the threat is serious, it may not result in catastrophic organizational impact unless combined with other vulnerabilities or poor network hygiene.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Nov 2025, 19:12 UTC

Technical details

References

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