How severe is CVE-2021-37786?

CVE-2021-37786 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-37786 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37786?

CVE-2021-37786 affects Bag Covid Certificate. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37786?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-37786 published?

CVE-2021-37786 was published on 2021-09-27 and last updated on 2026-06-17.

CVE-2021-37786

CVE-2021-37786 is a medium-severity vulnerability in Bag Covid Certificate with a CVSS 3.x base score of 4.6. 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-755.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
CVSS v2: 2.1
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-755
Affected product: Bag Covid Certificate
Published: 2021-09-27
Last modified: 2026-06-17

Description

Certain Federal Office of Information Technology Systems and Telecommunication FOITT products are affected by improper handling of exceptional conditions. This affects COVID Certificate App IOS 2.2.0 and below affected, patch in progress and COVID Certificate Check App IOS 2.2.0 and below affected, patch in progress. A denial of service (physically proximate) could be caused by scanning a crafted QR code.

Frequently asked questions

What is CVE-2021-37786?: Certain Federal Office of Information Technology Systems and Telecommunication FOITT products are affected by improper handling of exceptional conditions. This affects COVID Certificate App IOS 2.2.0 and below affected, patch in progress and COVID Certificate Check App IOS 2.2.0 and below affected, patch in progress. A denial of service (physically proximate) could be caused by scanning a crafted QR code.
How severe is CVE-2021-37786?: CVE-2021-37786 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-37786 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37786?: CVE-2021-37786 affects Bag Covid Certificate. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37786?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-37786 published?: CVE-2021-37786 was published on 2021-09-27 and last updated on 2026-06-17.

References

https://github.com/admin-ch/CovidCertificate-App-iOS/issues/146

Affected products (1)

cpe:2.3:a:bag:covid_certificate:*:*:*:*:*:iphone_os:*:*

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