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CVE-2010-1766

21
FAUCET Score

CVE-2010-1766 describes an off-by-one error in the WebKit rendering engine, specifically within the WebSocketHandshake function. This flaw, present in products like Qt and WebKit, allows a malicious WebSocket server to trigger memory corruption and a denial of service by sending a long, invalid upgrade header. The vulnerability carries a CVSS score of 7.5, indicating high severity. It is easily exploitable over the network with low attack complexity and no authentication required, potentially leading to partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, suggesting low public awareness and a lack of widespread attention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.6.2CPE matchmatch criteria
cpe:2.3:a:digia:qt:*:*:*:*:*:*:*:*
<= r56379CPE matchmatch criteria
cpe:2.3:a:webkit:webkit:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.25%
Probability of exploitation in next 30 days
EPSS Percentile
81.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0225 is in the 66th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: qt

Vendor Advisories (1)

redhatCVE-2010-1766Critical

WebKit: off-by-one memory corruption flaw WebSocketHandshake::readServerHandshake()

Jun 7, 2010

References

lists.fedoraproject.org / pipermail/package-announce/2010-July/044023.html
lists.fedoraproject.org / pipermail/package-announce/2010-July/044031.html
lists.opensuse.org / opensuse-security-announce/2011-01/msg00006.html
bugs.webkit.org / show_bug.cgi
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/40557
Vendor Advisory
secunia.com / advisories/41856
Vendor Advisory
secunia.com / advisories/43068
Vendor Advisory
trac.webkit.org / changeset/56380
mandriva.com / security/advisories
ubuntu.com / usn/USN-1006-1
vupen.com / english/advisories/2010/1801
Vendor Advisory
vupen.com / english/advisories/2010/2722
vupen.com / english/advisories/2011/0212
vupen.com / english/advisories/2011/0552