CyberSecBulletin
CVE-2020-25079Exploited in the wildNVD status: Analyzed

D-Link DCS-2530L and DCS-2670L Command Injection

Published Updated By the CyberSecBulletin desk

CVE-2020-25079 is a high-severity improper neutralization of special elements used in a command vulnerability in Dcs-4703e Firmware from D-Link, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists version 1.03.04 as the first without the flaw, so updating Dcs-4703e Firmware to that release or later removes the exposure. CISA added it to the Known Exploited Vulnerabilities catalogue on August 5, 2025, which means attacks have been observed in the wild.

Patch now

Attackers are already exploiting this vulnerability, according to CISA.

What to do

  1. Update Dcs-4703e Firmware to 1.03.04 or a later version.
  2. Update Dcs-4705e Firmware to 1.03.02 or a later version.
  3. Update Dcs-4802e Firmware to 2.01.01 or a later version.
  4. CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  5. Read the advisory on supportannouncement.us.dlink.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
D-LinkDcs-4703e Firmwarebefore 1.03.041.03.04
D-LinkDcs-4705e Firmwarebefore 1.03.021.03.02
D-LinkDcs-4802e Firmwarebefore 2.01.012.01.01
D-LinkDcs-p703 FirmwareNot specified in the recordNot stated
D-LinkDcs-4603 Firmwarebefore 1.04.021.04.02
D-LinkDcs-4622 Firmwarebefore 2.01.102.01.10
D-LinkDcs-4701e Firmwarebefore 2.03.012.03.01
D-LinkDcs-2530l Firmware1.05.05 and earlierNot stated
D-LinkDcs-2670l Firmwarebefore 2.03.002.03.00

Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.18.8HighNVD
CVSS 3.18.8HighCISA (ADP)
CVSS 2.09.0HighNVD

Official description

An issue was discovered on D-Link DCS-2530L before 1.06.01 Hotfix and DCS-2670L through 2.02 devices. cgi-bin/ddns_enc.cgi allows authenticated command injection.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Neutralization of Special Elements used in a Command

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

How developers prevent this class of flaw

  • If at all possible, use library calls rather than external processes to recreate the desired functionality.
  • If possible, ensure that all external commands called from the program are statically created.
  • Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.

More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: active, automatable: no, technical impact: total).
  3. Added to CISA's Known Exploited Vulnerabilities catalogue.
  4. Deadline for US federal agencies to remediate, set by CISA.
  5. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Other vulnerabilities in Dcs-4703e Firmware

All Dcs-4703e Firmware vulnerabilities

Recent Improper Neutralization of Special Elements used in a Command vulnerabilities

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