Improper certificate validation in NTT DATA Corporation 'MyPallete' and some of the…
Priority LOW 35CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.
Summary
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.
Why it matters now
EPSS 0.01175 67th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NTT DATA Corporation | 'MyPallete' and some of the Android banking applications that use 'MyPallete' | 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 | — | No fix listed | CNA |
- 'MyPallete' and some of the Android banking applications that use 'MyPallete' VendorNTT DATA Corporation 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 Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:77bank:77_bank:*:*:*:*:*:android:*:* | up to 2.0.1 | Vulnerable | 77bank |
| cpe:2.3:a:ashikagabank:ashigin:*:*:*:*:*:android:*:* | up to 1.0.4 | Vulnerable | Ashikagabank |
| cpe:2.3:a:hokkaidobank:dogin:*:*:*:*:*:android:*:* | up to 3.0.1 | Vulnerable | Hokkaidobank |
| cpe:2.3:a:hokugin:hokuriku_bank_portal:*:*:*:*:*:android:*:* | up to 2.0.1 | Vulnerable | Hokugin |
| cpe:2.3:a:naganobank:nagagin:*:*:*:*:*:android:*:* | up to 1.0.1 | Vulnerable | Naganobank |
| cpe:2.3:a:nttdata:mypallete:-:*:*:*:*:android:*:* | not specified by NVD | Vulnerable | NTT DATA Corporation |
| cpe:2.3:a:shikokubank:shikoku_bank:*:*:*:*:*:android:*:* | up to 2.0.1 | Vulnerable | Shikokubank |
| cpe:2.3:a:sihd-bk:ikeda_senshu_bank:*:*:*:*:*:android:*:* | up to 3.0.4 | Vulnerable | Sihd-bk |
| cpe:2.3:a:tohoku-bank:tougin:*:*:*:*:*:android:*:* | up to 1.0.1 | Vulnerable | Tohoku-bank |
- cpe:2.3:a:77bank:77_bank:*:*:*:*:*:android:*:* Versions up to 2.0.1 Vulnerable ·77bank
- cpe:2.3:a:ashikagabank:ashigin:*:*:*:*:*:android:*:* Versions up to 1.0.4 Vulnerable ·Ashikagabank
- cpe:2.3:a:hokkaidobank:dogin:*:*:*:*:*:android:*:* Versions up to 3.0.1 Vulnerable ·Hokkaidobank
- cpe:2.3:a:hokugin:hokuriku_bank_portal:*:*:*:*:*:android:*:* Versions up to 2.0.1 Vulnerable ·Hokugin
- cpe:2.3:a:naganobank:nagagin:*:*:*:*:*:android:*:* Versions up to 1.0.1 Vulnerable ·Naganobank
- cpe:2.3:a:nttdata:mypallete:-:*:*:*:*:android:*:* Versions not specified by NVD Vulnerable ·NTT DATA Corporation
- cpe:2.3:a:shikokubank:shikoku_bank:*:*:*:*:*:android:*:* Versions up to 2.0.1 Vulnerable ·Shikokubank
- cpe:2.3:a:sihd-bk:ikeda_senshu_bank:*:*:*:*:*:android:*:* Versions up to 3.0.4 Vulnerable ·Sihd-bk
- cpe:2.3:a:tohoku-bank:tougin:*:*:*:*:*:android:*:* Versions up to 1.0.1 Vulnerable ·Tohoku-bank
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-5523
- 2026-10-03 Alias added: GHSA-qrwh-wc9j-x9cj
References
Advisory 10
- http://www.dokodemobank.ne.jp/info_20200128_bankingapp.html
- https://www.ashikagabank.co.jp/appbanking/pdf/oshirase.pdf
- https://www.sihd-bk.jp/common_v2/pdf/20200127.pdf
- https://www.shikokubank.co.jp/info/apps20200128.html
- https://www.tohoku-bank.co.jp/news/topics/200128_applissl.html
- https://www.naganobank.co.jp/soshiki/2/app-ssl.html
- https://www.77bank.co.jp/pdf/oshirase/20012801_appvulnerability.pdf
- https://www.hokkaidobank.co.jp/common/dat/2020/0120/15795047141946146699.pdf
- https://www.hokugin.co.jp/info/archives/personal/2020/1913.html
- http://jvn.jp/en/jp/JVN28845872/index.html
Sources
- CVE-2020-5523 · CVE Program
- CVE-2020-5523 · NVD
- FIRST EPSS
- GHSA-qrwh-wc9j-x9cj · GitHub Advisory Database · CC BY 4.0
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