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Vulnerability record · CVE-2010-2621 · published 2 July 2010

CVE-2010-2621: Digia qt improper input validation vulnerability

Digia · Qt

The QSslSocketBackendPrivate::transmit function in src_network_ssl_qsslsocket_openssl.cpp in Qt 4.6.3 and earlier allows remote attackers to cause a denial of service (infinite loop) via a malformed request.

5.0 CVSS 2.0 Medium EPSS 11% · top 4.4% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

The QSslSocketBackendPrivate::transmit function in src_network_ssl_qsslsocket_openssl.cpp in Qt 4.6.3 and earlier allows remote attackers to cause a denial of service (infinite loop) via a malformed request.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://aluigi.org/adv/qtsslame-adv.txt
http://aluigi.org/poc/qtsslame.zip Exploit
http://osvdb.org/65860
http://qt.gitorious.org/qt/qt/commit/c25c7c9bdfade6b906f37ac8bad44f6f0de57597
http://secunia.com/advisories/40389 Vendor Advisory
http://secunia.com/advisories/46410 Vendor Advisory
http://www.securityfocus.com/bid/41250 Exploit
http://www.vupen.com/english/advisories/2010/1657 Vendor Advisory
https://hermes.opensuse.org/messages/12056605
http://aluigi.org/adv/qtsslame-adv.txt
http://aluigi.org/poc/qtsslame.zip Exploit
http://osvdb.org/65860
http://qt.gitorious.org/qt/qt/commit/c25c7c9bdfade6b906f37ac8bad44f6f0de57597
http://secunia.com/advisories/40389 Vendor Advisory
http://secunia.com/advisories/46410 Vendor Advisory
http://www.securityfocus.com/bid/41250 Exploit
http://www.vupen.com/english/advisories/2010/1657 Vendor Advisory
https://hermes.opensuse.org/messages/12056605

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2010-2621), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.