Security readout for executives and security teams
Plain-English summary
CVE-2021-28025 is an integer overflow in Qt's qtsvg SVG handling code. The public record says local attackers can cause denial of service. For executives, the main risk is application interruption where affected Qt SVG parsing is present, not confirmed remote compromise or data theft.
Executive priority
Address during normal vulnerability remediation unless affected systems are critical, multi-user, or ingest untrusted SVG content. Escalate if business services can be disrupted by local users or shared-file workflows.
Technical view
The issue is reported in qsvghandler.cpp in Qt qtsvg versions 5.15.1, 6.0.0, 6.0.2, and 6.2. The described impact is denial of service from integer overflow. The source bundle does not provide CVSS, CWE, CPEs, patch version, or detailed trigger conditions.
Likely exposure
Exposure is most likely in software that embeds the listed Qt qtsvg versions and processes SVG content in local workflows. The bundle does not identify downstream products or platforms, so asset owners must map Qt/qtsvg usage in their own software inventory.
Exploitation context
The CVE description limits the attacker model to local attackers causing DoS. The bundle does not show CISA KEV listing, public exploitation evidence, exploit maturity, or remote attack claims. Treat active exploitation as unconfirmed.
Researcher notes
The public bundle is sparse. It names the vulnerable file, component, versions, and DoS impact, but omits scoring, root-cause detail, fixed version, and reproduction specifics. Avoid claiming broader product exposure without independent inventory evidence.
Mitigation direction
- Identify applications and builds using Qt qtsvg in the listed versions.
- Check Qt vendor guidance and QTBUG-91507 for fixed releases or workarounds.
- Prioritize updates for systems processing untrusted or user-supplied SVG files.
- Restrict local SVG processing paths where updates are not immediately available.
Validation and detection
- Inventory Qt and qtsvg versions in packaged applications and build manifests.
- Review whether affected applications parse SVG files from local users or shared storage.
- Confirm vendor advisory or Qt bug status before declaring remediation complete.
- Regression test SVG handling after updating Qt/qtsvg components.
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
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CVE-2021-28025 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://bugreports.qt.io/browse/QTBUG-91507CVE reference
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.