CVE-2020-5523Android App 'MyPallete' and some of the Android banking applications based on 'MyPallete' do not verify X.509 certificates from servers,…
- 7.4HighCVSS base score
- 1.2%Exploitation in 30 daysEPSS · top 32% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Android App 'MyPallete' and some of the Android banking applications based on 'MyPallete' do not verify X.509 certificates from servers, and also do not properly validate certificates with host-mismatch, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
Timeline
ID reserved
By jpcert
- 22 days later
· 22 days later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 1.2% · top 32% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Affected products
NTT Data Corporation · 'MyPallete' and some of the Android banking applications that use 'MyPallete'
- affected MyPallete all versions, AshikagaBankingAppli ver1.0.4 and earlier, SENSHUIKEDABANKBankingAppli ver3.0.4 and earlier, ShikokuBankingAppli ver2.0.1 and earlier, TohokuBankingAppli ver1.0.1 and earlier, NaganoBankingAppli ver1.0.1 and earlier, 77BankingAppli ver2.0.1 and earlier, HokkaidoBankingAppli ver3.0.1 and earlier, and HokurikuBankingAppli ver2.0.1 and earlier
References
References10
- http://www.dokodemobank.ne.jp/info_20200128_bankingapp.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.ashikagabank.co.jp/appbanking/pdf/oshirase.pdf (opens in a new tab)x_refsource_MISCx_transferred
- https://www.sihd-bk.jp/common_v2/pdf/20200127.pdf (opens in a new tab)x_refsource_MISCx_transferred
- https://www.shikokubank.co.jp/info/apps20200128.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.tohoku-bank.co.jp/news/topics/200128_applissl.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.naganobank.co.jp/soshiki/2/app-ssl.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.77bank.co.jp/pdf/oshirase/20012801_appvulnerability.pdf (opens in a new tab)x_refsource_MISCx_transferred
- https://www.hokkaidobank.co.jp/common/dat/2020/0120/15795047141946146699.pdf (opens in a new tab)x_refsource_MISCx_transferred
- https://www.hokugin.co.jp/info/archives/personal/2020/1913.html (opens in a new tab)x_refsource_MISCx_transferred
- http://jvn.jp/en/jp/JVN28845872/index.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-26686 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-5523)Record last updated .