CVE-2025-4211
HighCVSS 7.3Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
A symlink attack vulnerability was found in the Qt corelib module on Windows via QFileSystemEngine. The use of GetTempPath API allows manipulation of temporary file paths, potentially leading to unauthorized access and privilege escalation.
Risk Assessment
A local attacker can gain elevated privileges or access sensitive data by replacing temporary files.
Recommendation
Update Qt to version 5.15.19, 6.5.9, 6.8.2, or 6.9.0.
Other vulnerabilities in Qt
See all- CVE-2025-6338Critical
Incomplete cleanup in Qt Network's Schannel support on Windows can lead to a Denial of Service over time. Affects Qt from 5.15.0 through 6.8.3 and from 6.9.0 before 6.9.2.
- CVE-2023-51714Critical
In the HTTP2 implementation in Qt before 5.15.17, 6.2.11, 6.5.4, and 6.6.2, there is an incorrect HPack integer overflow check in hpacktable.cpp.
- CVE-2026-78253Low
Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.
- CVE-2026-19248High
QDomDocument XML parsing is vulnerable to a remotely-triggerable denial-of-service crash when processing untrusted input.
- CVE-2026-9499Medium
An out-of-bounds read vulnerability in QTextCodec::codecForName() in Qt. When called with a non-NUL-terminated QByteArray, the codec-name matching routine reads past the buffer. This usually results in incorrect codec selection; worst case, it causes a crash (DoS). Affects Qt5Compat module from Qt 6.0.0 and Qt Core in Qt 4.x and 5.x.
- CVE-2025-12385High
In Qt Quick, the Text component lacks validation of width and height in the <img> tag, potentially causing excessive resource allocation and application unresponsiveness. Affects Qt from 5.0.0 through 6.10.0.
- CVE-2025-5992Low
A vulnerability in Qt's QColorTransferGenericFunction causes a denial of service when passing values outside the expected range, e.g., when processing a specially crafted ICC profile via QColorSpace::fromICCProfile. Affects Qt from 6.6.0 through 6.8.3 and from 6.9.0 through 6.9.1; fixed in 6.8.4 and 6.9.2.
- CVE-2025-5991Low
A Use-After-Free vulnerability in Qt's QHttp2ProtocolHandler in the QtNetwork module affects only HTTP/2 handling. It arises from a race condition between uploading POST request body and simultaneous handling of HTTP errors. Affects only Qt 6.9.0; fixed in Qt 6.9.1.
- CVE-2025-5683Medium
A vulnerability in Qt causes a crash when loading a specially crafted ICNS image file via QImage. Affects Qt versions 6.3.0 through 6.5.9, 6.6.0 through 6.8.4, and 6.9.0. Fixed in 6.5.10, 6.8.5, and 6.9.1.
- CVE-2025-5455High
An issue was found in the private API function qDecodeDataUrl() in QtCore, used in QTextDocument and QNetworkReply. Calling it with malformed data, e.g., a URL with a "charset" parameter lacking a value, triggers an assertion and aborts the program (denial of service).
Original NVD description (English source)
Improper Link Resolution Before File Access ('Link Following') vulnerability in QFileSystemEngine in the Qt corelib module on Windows which potentially allows Symlink Attacks and the use of Malicious Files. Issue originates from CVE-2024-38081. The vulnerability arises from the use of the GetTempPath API, which can be exploited by attackers to manipulate temporary file paths, potentially leading to unauthorized access and privilege escalation. The affected public API in the Qt Framework is QDir::tempPath() and anything that uses it, such as QStandardPaths with TempLocation, QTemporaryDir, and QTemporaryFile. This issue affects all version of Qt up to and including 5.15.18, from 6.0.0 through 6.5.8, from 6.6.0 through 6.8.1. It is fixed in Qt 5.15.19, Qt 6.5.9, Qt 6.8.2, 6.9.0
Vulnerability data from NVD (NIST) · CISA KEV · EPSS