How severe is CVE-2020-36285?

CVE-2020-36285 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-36285 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36285?

CVE-2020-36285 affects Unionpayintl Union Pay. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36285?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-36285 published?

CVE-2020-36285 was published on 2021-04-06 and last updated on 2026-06-17.

CVE-2020-36285

CVE-2020-36285 is a high-severity vulnerability in Unionpayintl Union Pay with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Unionpayintl Union Pay
Published: 2021-04-06
Last modified: 2026-06-17

Description

Union Pay up to 3.3.12, for iOS mobile apps, contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability, allows attackers to shop for free in merchants' websites and mobile apps, via a crafted authentication code (MAC) which is generated based on a secret key which is NULL.

Frequently asked questions

What is CVE-2020-36285?: Union Pay up to 3.3.12, for iOS mobile apps, contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability, allows attackers to shop for free in merchants' websites and mobile apps, via a crafted authentication code (MAC) which is generated based on a secret key which is NULL.
How severe is CVE-2020-36285?: CVE-2020-36285 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-36285 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36285?: CVE-2020-36285 affects Unionpayintl Union Pay. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36285?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-36285 published?: CVE-2020-36285 was published on 2021-04-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:unionpayintl:union_pay:*:*:*:*:*:iphone_os:*:*

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