CVE-2021-26620 json
IPTIME NAS2dual improper authentication vulnerability
published 2022-03-25 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13414
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- EFM Networks Co., Ltd ipTIME NAS product (NAS1, 2, 3, 4, 1dual, 2dual 4dual) 1.4.82
Exploit prediction
1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- EFM Networks Co., Ltd ipTIME NAS product (NAS1, 2, 3, 4, 1dual, 2dual 4dual)
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
krcert.or.kr
/krcert/secNoticeView.do?bulletin_writing_sequence=66578
third-party-advisory
Sources
- CVE List CVE-2021-26620
- NVD CVE-2021-26620
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.