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Vulnerability record · CVE-2012-3561 · published 14 June 2012

CVE-2012-3561: Opera browser memory buffer overflow vulnerability

Opera · Opera Browser

Opera before 11.64 does not properly allocate memory for URL strings, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted string.

10.0 CVSS 2.0 High EPSS 5.2% · top 7.8% CWE-119 · Memory buffer overflow
10.0CVSS 2.0 base score
5.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
16 Jun 2026Last modified by NVD

Description

Opera before 11.64 does not properly allocate memory for URL strings, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted string.

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

Affected products

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

References

LinkTags
http://osvdb.org/81809
http://www.opera.com/docs/changelogs/mac/1164/
http://www.opera.com/docs/changelogs/unix/1164/
http://www.opera.com/docs/changelogs/windows/1164/
http://www.opera.com/support/kb/view/1016/ Vendor Advisory
http://osvdb.org/81809
http://www.opera.com/docs/changelogs/mac/1164/
http://www.opera.com/docs/changelogs/unix/1164/
http://www.opera.com/docs/changelogs/windows/1164/
http://www.opera.com/support/kb/view/1016/ Vendor Advisory

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Related vulnerabilities

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

10.0CVE-2013-3211Opera browser vulnerabilityUnspecified vulnerability in Opera before 12.15 has unknown impact and attack vectors, related to a "moderately severe issue."EPSS 1.7%10.0CVE-2012-4145Opera browser vulnerabilityUnspecified vulnerability in Opera before 12.01 on Windows and UNIX, and before 11.66 and 12.x before 12.01 on Mac OS X, has unknown impact and attac…EPSS 2.2%10.0CVE-2012-3559Opera browser vulnerabilityUnspecified vulnerability in Opera before 12.00 on Mac OS X has unknown impact and attack vectors, related to a "moderate severity issue."EPSS 1.4%10.0CVE-2011-4683Opera browser vulnerabilityUnspecified vulnerability in Opera before 11.60 has unknown impact and attack vectors, related to a "moderately severe issue."EPSS 2.0%10.0CVE-2011-4684Opera browser vulnerabilityOpera before 11.60 does not properly handle certificate revocation, which has unspecified impact and remote attack vectors related to "corner cases."EPSS 5.7%10.0CVE-2011-2610Opera browser vulnerabilityUnspecified vulnerability in Opera before 11.50 has unknown impact and attack vectors, related to a "moderately severe issue."EPSS 2.1%10.0CVE-2011-2628Opera browser improper input validation vulnerabilityOpera before 11.11 does not properly implement FRAMESET elements, which allows remote attackers to execute arbitrary code or cause a denial of servic…EPSS 13%10.0CVE-2010-4581Opera browser vulnerabilityUnspecified vulnerability in Opera before 11.00 has unknown impact and attack vectors, related to "a high severity issue."EPSS 2.1%

Source: NIST National Vulnerability Database (record CVE-2012-3561), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.