{"id":"CVE-2020-5523","aliases":["EUVD-2020-26686","GHSA-qrwh-wc9j-x9cj"],"status":"published","title":"Android App 'MyPallete' and some of the Android banking applications based on 'MyPallete' do not...","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.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01175,"percentile":0.67783,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2020-01-28T05:25:48Z","modified":"2026-06-17T03:21:32Z","products":[{"vendor":"77bank","product":"77_bank"},{"vendor":"ashikagabank","product":"ashigin"},{"vendor":"hokkaidobank","product":"dogin"},{"vendor":"hokugin","product":"hokuriku_bank_portal"},{"vendor":"naganobank","product":"nagagin"},{"vendor":"ntt data corporation","product":"'mypallete' and some of the android banking applications that use 'mypallete'"},{"vendor":"nttdata","product":"mypallete"},{"vendor":"shikokubank","product":"shikoku_bank"},{"vendor":"sihd-bk","product":"ikeda_senshu_bank"},{"vendor":"tohoku-bank","product":"tougin"}],"references":[{"url":"http://www.dokodemobank.ne.jp/info_20200128_bankingapp.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.ashikagabank.co.jp/appbanking/pdf/oshirase.pdf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.sihd-bk.jp/common_v2/pdf/20200127.pdf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.shikokubank.co.jp/info/apps20200128.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.tohoku-bank.co.jp/news/topics/200128_applissl.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.naganobank.co.jp/soshiki/2/app-ssl.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.77bank.co.jp/pdf/oshirase/20012801_appvulnerability.pdf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.hokkaidobank.co.jp/common/dat/2020/0120/15795047141946146699.pdf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.hokugin.co.jp/info/archives/personal/2020/1913.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"http://jvn.jp/en/jp/JVN28845872/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5523"},{"url":"https://github.com/advisories/GHSA-qrwh-wc9j-x9cj"}],"sources":{"cve":[{"id":"CVE-2020-5523","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.","status":"published","published":"2020-01-28T05:25:48Z","modified":"2024-08-04T08:30:24.582Z","updated_at":"2026-11-02T14:35:47.56691Z"}],"euvd":[{"id":"EUVD-2020-26686","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.","status":"published","published":"2020-01-28T05:25:48Z","modified":"2024-08-04T08:30:24Z","updated_at":"2026-11-03T03:08:06.745484Z"}],"ghsa":[{"id":"GHSA-qrwh-wc9j-x9cj","title":"Android App 'MyPallete' and some of the Android banking applications based on 'MyPallete' do not...","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.","status":"published","published":"2022-05-24T17:07:37Z","modified":"2023-01-29T05:01:14Z","updated_at":"2026-11-02T14:44:45.930691Z"}],"nvd":[{"id":"CVE-2020-5523","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.","status":"published","published":"2020-01-28T06:15:12.353Z","modified":"2026-06-17T03:21:32.18Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:05:53.837808Z"}]}}