Security readout for executives and security teams
Plain-English summary
This is a denial-of-service issue in the Nextcloud Android Client. A malicious app on the same Android device could make vulnerable Nextcloud app versions crash. The sources identify no data theft or data modification impact, and the issue is fixed in version 3.15.1.
Executive priority
Treat this as a moderate mobile availability risk, not a server compromise. Prioritize updating managed Android devices, especially for staff who rely on Nextcloud mobile access for operational workflows.
Technical view
Versions before Nextcloud Android Client 3.15.1 can crash because of an uncaught exception, tracked as CWE-248. CVSS 3.1 is 4.1 with physical attack vector, low complexity, low privileges, user interaction required, unchanged scope, and high availability impact only.
Likely exposure
Exposure is limited to Android devices running the Nextcloud Android Client before 3.15.1, especially where untrusted or malicious apps may be installed on the same device. This is not described as a Nextcloud server vulnerability.
Exploitation context
The bundle does not show CISA KEV listing or other evidence of active exploitation. The attack conditions are constrained: same-device malicious app, low privileges, and user interaction, with the observed impact limited to crashing the client.
Researcher notes
The available sources support an uncaught-exception client crash before version 3.15.1. They do not support confidentiality or integrity impact, active exploitation, or broader affected products beyond the Nextcloud Android Client.
Mitigation direction
- Update Nextcloud Android Client to version 3.15.1 or later.
- Use MDM or app inventory to identify outdated Android clients.
- Restrict installation of untrusted Android apps on managed devices.
- Check Nextcloud vendor guidance for any newer related recommendations.
Validation and detection
- Confirm installed Nextcloud Android Client versions across managed Android devices.
- Verify devices previously below 3.15.1 have received the patched version.
- Review mobile crash telemetry or support reports for recurring client crashes.
- Confirm this is tracked separately from Nextcloud server exposure.
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.
CWE-248: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-32694 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H0.53.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.1MediumVector: CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h2gm-m374-99vcCVE reference · x_refsource_CONFIRM
- https://github.com/nextcloud/android/pull/7919CVE reference · x_refsource_MISC
- https://hackerone.com/reports/859136CVE 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.
Uncaught Exception
Uncaught Exception represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.