vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2021-26620

IPTIME NAS2dual improper authentication vulnerability

HIGH
7.5
CVSS Score
Published: March 25, 2022 at 06:02 PM UTC
Updated: June 17, 2026 at 03:43 AM UTC
25 products affected across 2 vendorsNAS4DUAL FirmwareNAS1DUAL FirmwareNAS2DUAL Firmware

Using ipTIME NAS product (NAS1, 2, 3, 4, 1dual, 2dual 4dual) by EFM Networks Co., Ltd?

Get instant alerts when new vulnerabilities affect ipTIME NAS product (NAS1, 2, 3, 4, 1dual, 2dual 4dual) - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

An improper authentication vulnerability leading to information leakage was discovered in iptime NAS2dual. Remote attackers are able to steal important information in the server by exploiting vulnerabilities such as insufficient authentication when accessing the shared folder and changing user’s passwords.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

NAS I Firmware· Iptime
95%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement
iptime-nas-i (same device)
NAS Ii Firmware· Iptime
95%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement
iptime-nas-ii (same device)
NAS Iie Firmware· Iptime
95%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement
iptime-nas-iie (same device)
NAS101 Firmware· Iptime
95%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement
iptime-nas101 (same device)
NAS1DUAL Firmware· Iptime
95%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement
iptime-nas1dual (same device)
NAS2DUAL Firmware· Iptime
95%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement
iptime-nas2dual (same device)
NAS3 Firmware· Iptime
95%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement
iptime-nas3 (same device)
NAS4 Firmware· Iptime
95%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement
iptime-nas4 (same device)
NAS4DUAL Firmware· Iptime
95%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement
iptime-nas4dual (same device)
ipTIME NAS1· Efm Networks
60%
v < 1.4.82
Affected range stops below 1.4.82, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66578

CVSS

7.5HIGHkrcert
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card