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Dir 615 Firmware CVE-2021-42627

CRITICAL
2022-08-23 cve@mitre.org
Information Disclosure D-Link Dir 615 Firmware Dir 615 J1 Firmware Dir 615 T1 Firmware Dir 615Jx10 Firmware
9.8
CVSS 3.1 · NVD
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Vulnerability Assessment

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 67.44%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.
Emergency Immediate action required. Why: CRITICAL + EPSS > 30%, no patch available.
No patch listed yet 67.4% exploitation probability (EPSS)

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AnalysisAI

The WAN configuration page "wan.htm" on D-Link DIR-615 devices with firmware 20.06 can be accessed directly without authentication which can lead to disclose the information about WAN settings and. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 67.4%.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

The WAN configuration page "wan.htm" on D-Link DIR-615 devices with firmware 20.06 can be accessed directly without authentication which can lead to disclose the information about WAN settings and also leverage attacker to modify the data fields of page. Affected products include: Dlink Dir-615 Firmware, Dlink Dir-615 J1 Firmware, Dlink Dir-615 T1 Firmware, Dlink Dir-615Jx10 Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

The WAN configuration page "wan.htm" on D-Link DIR-615 devices with firmware 20.06 can be accessed directly without authentication which can lead to disclose the information about WAN settings and also leverage attacker to modify the data fields of page.

Threat Intelligence Overview

Threat Score
5.5/10
Composite threat intelligence
EPSS Score
67.4%
Top 1% exploitable
Exploit
POC
Public exploit code exists
Data Quality
5 sources
Confidence: Medium
NVD CVE.org EPSS POC (1) GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC Yes
EPSS 67.4%
Patch available No
Active threat Yes
Deciding rule
CRITICAL + EPSS > 30%, no patch available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

136
Low Medium High Critical
KEV: 0
EPSS: +67
CVSS: +49
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:o:dlink:dir-615_firmware:20.06:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-615_j1_firmware:20.06:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-615_t1_firmware:20.06:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-615jx10_firmware:20.06:*:*:*:*:*:*:*

More in Dir 615 Firmware

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A buffer overflow in D-Link DIR-615 C2 3.03WW. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploi
CVE-2019-16920 CRITICAL POC
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Unauthenticated remote code execution occurs in D-Link products such as DIR-655C, DIR-866L, DIR-652, and DHP-1565. Rated
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D-Link DIR-615 devices have a buffer overflow via a long Authorization HTTP header. Rated critical severity (CVSS 9.8),

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D-Link DIR-615 HW: T1 FW:20.09 is vulnerable to Cross-Site Request Forgery (CSRF) vulnerability. Rated high severity (CV
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Unauthenticated remote attackers can execute arbitrary OS commands on D-Link DIR-615 4.10 routers through manipulated ro
CVE-2026-1505 HIGH POC
7.2 Jan 28

Command injection in D-Link DIR-615 firmware via the /set_temp_nodes.php URL Filter component allows unauthenticated rem
CVE-2026-1448 HIGH POC
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Remote code execution in D-Link DIR-615 firmware through os command injection via the ipaddr parameter in the Web Manage
CVE-2026-2151 HIGH POC
7.2 Feb 08

Remote code execution in D-Link DIR-615 firmware through os command injection via the dmz_ipaddr parameter in the DMZ Ho
CVE-2026-1506 HIGH POC
7.2 Jan 28

Unauthenticated remote attackers can inject arbitrary OS commands through the MAC filter configuration parameter in D-Li
CVE-2018-10431 HIGH POC
7.2 Apr 26

D-Link DIR-615 2.5.17 devices allow Remote Code Execution via shell metacharacters in the Host field of the System / Tra

Same technique Information Disclosure

View all
CVE-2019-2725 CRITICAL POC
9.8
CVE-2021-34523 CRITICAL POC
9.0
CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2025-68613 HIGH POC
8.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

References

Advisories & patches
ADVISORY https://vuldb.com/vuln/207017 ADVISORY https://www.dlink.com/en/security-bulletin/ REF http://d-link.com REF http://dlink.com REF https://github.com/sanjokkarki/D-Link-DIR-615/blob/main/CVE-2021-42627

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