CVE-2020-5523

7.4 HIGH 1% exploit odds No fix listed

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering.
Exploit odds: 1.2% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2020-01-28 06:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 03:21 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.2% in the next 30 days (EPSS).
Severity: 7.4 HIGH (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2020-01-28 06:15 UTC
Last modified: 2026-06-17 03:21 UTC
Exploit probability: 1.2% · EPSS, next 30 days
Weakness: CWE-295 · Improper certificate validation
Record status: Modified

Affected

77bank 77 Bank ≤ 2.0.1
Ashikagabank Ashigin ≤ 1.0.4
Hokkaidobank Dogin ≤ 3.0.1
Hokugin Hokuriku Bank Portal ≤ 2.0.1
Naganobank Nagagin ≤ 1.0.1
Nttdata Mypallete
Shikokubank Shikoku Bank ≤ 2.0.1
sihd-bk Ikeda Senshu Bank ≤ 3.0.4

Attack profile CVSS 3.1 · 7.4

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Raw vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Is it in your code?

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References

NVD record · CVE.org record