Security readout for executives and security teams
Plain-English summary
This vulnerability could make affected FOITT iOS COVID Certificate apps stop working when they scan a malicious QR code. The impact is denial of service, not data theft, based on the provided sources. The issue requires physical proximity or operational access to a scanner interaction.
Executive priority
Treat this as a targeted availability risk for affected certificate-check operations, not a broad enterprise compromise. Prioritize if the organization still depends on these iOS apps for public-facing or high-volume scanning workflows.
Technical view
CVE-2021-37786 describes improper handling of exceptional conditions in FOITT COVID Certificate App iOS and COVID Certificate Check App iOS versions 2.2.0 and below. The stated failure mode is denial of service triggered during QR-code scanning. No CVSS, CWE, patch version, or confirmed exploit activity is provided.
Likely exposure
Exposure appears limited to iOS deployments of the named FOITT COVID Certificate apps at version 2.2.0 or earlier, especially check workflows that scan untrusted QR codes. The source bundle lists affected vendor/product metadata as n/a, so inventory should rely on the named app descriptions.
Exploitation context
The CVE states exploitation is physically proximate and tied to scanning a crafted QR code. CISA KEV status is false in the bundle, and no cited source confirms active exploitation. Evidence is insufficient to claim internet-scale or remote exploitation.
Researcher notes
The record lacks CVSS, CWE, detailed root cause, and final fixed-version data. Analysis should stay constrained to denial of service in the named iOS apps. Do not infer Android, backend, certificate-data, or broader QR-parser exposure from this bundle alone.
Mitigation direction
- Identify any FOITT COVID Certificate iOS app deployments at version 2.2.0 or below.
- Check FOITT or project guidance for patch availability before continued operational use.
- Reduce exposure to untrusted QR scans where business operations allow.
- Monitor the referenced GitHub issue and CVE record for final remediation details.
Validation and detection
- Confirm app name, platform, and installed version on managed iOS devices.
- Review operational incident logs for app crashes during certificate scanning.
- Verify whether a vendor patch or fixed release has become available.
- Track whether affected scanner workflows remain in active business use.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-37786 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/admin-ch/CovidCertificate-App-iOS/issues/146CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.