How severe is CVE-2007-6523?

CVE-2007-6523 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-6523 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-6523?

CVE-2007-6523 primarily affects Opera Opera Browser. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-6523?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2007-6523 published?

CVE-2007-6523 was published on 2007-12-24 and last updated on 2026-06-16.

CVE-2007-6523

CVE-2007-6523 is a high-severity vulnerability in Opera Opera Browser with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Opera Opera Browser
Published: 2007-12-24
Last modified: 2026-06-16

Description

Algorithmic complexity vulnerability in Opera 9.50 beta and 9.x before 9.25 allows remote attackers to cause a denial of service (CPU consumption) via a crafted bitmap (BMP) file that triggers a large number of calculations and checks.

Frequently asked questions

What is CVE-2007-6523?: Algorithmic complexity vulnerability in Opera 9.50 beta and 9.x before 9.25 allows remote attackers to cause a denial of service (CPU consumption) via a crafted bitmap (BMP) file that triggers a large number of calculations and checks.
How severe is CVE-2007-6523?: CVE-2007-6523 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2007-6523 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-6523?: CVE-2007-6523 primarily affects Opera Opera Browser. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-6523?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2007-6523 published?: CVE-2007-6523 was published on 2007-12-24 and last updated on 2026-06-16.

References

Affected products (14)

cpe:2.3:a:opera:opera_browser:9.0:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.0:beta1:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.0:beta2:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.01:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.02:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.10:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.12:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.20:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.20:beta1:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.21:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.22:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.23:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.24:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.50:beta1:*:*:*:*:*:*

More vulnerabilities in Opera Opera Browser

CVE-2013-3211 — Critical (CVSS 10.0): Unspecified vulnerability in Opera before 12.15 has unknown impact and attack vectors, related to a "moderately severe…
CVE-2012-4145 — Critical (CVSS 10.0): Unspecified vulnerability in Opera before 12.01 on Windows and UNIX, and before 11.66 and 12.x before 12.01 on Mac OS…
CVE-2012-3561 — Critical (CVSS 10.0): Opera before 11.64 does not properly allocate memory for URL strings, which allows remote attackers to execute…
CVE-2012-3559 — Critical (CVSS 10.0): Unspecified vulnerability in Opera before 12.00 on Mac OS X has unknown impact and attack vectors, related to a…
CVE-2011-4684 — Critical (CVSS 10.0): Opera before 11.60 does not properly handle certificate revocation, which has unspecified impact and remote attack…
CVE-2011-4683 — Critical (CVSS 10.0): Unspecified vulnerability in Opera before 11.60 has unknown impact and attack vectors, related to a "moderately severe…

All CVEs affecting Opera Opera Browser →

Other CWE-189 (Numeric Errors) vulnerabilities

CVE-2015-8396 — Critical (CVSS 10.0): Integer overflow in the ImageRegionReader::ReadIntoBuffer function in…
CVE-2015-7205 — Critical (CVSS 10.0): Integer underflow in the RTPReceiverVideo::ParseRtpPacket function in Mozilla Firefox before 43.0 and Firefox ESR 38.x…
CVE-2015-6575 — Critical (CVSS 10.0): SampleTable.cpp in libstagefright in Android before 5.1.1 LMY48I does not properly consider integer promotion, which…
CVE-2015-3864 — Critical (CVSS 10.0): Integer underflow in the MPEG4Extractor::parseChunk function in MPEG4Extractor.cpp in libstagefright in mediaserver in…
CVE-2015-3836 — Critical (CVSS 10.0): The Parse_wave function in arm-wt-22k/lib_src/eas_mdls.c in the Sonivox DLS-to-EAS converter in Android before 5.1.1…
CVE-2015-3834 — Critical (CVSS 10.0): Multiple integer overflows in the BnHDCP::onTransact function in media/libmedia/IHDCP.cpp in libstagefright in Android…

Browse all CWE-189 (Numeric Errors) vulnerabilities →