How severe is CVE-2007-5276?

CVE-2007-5276 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2007-5276 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-5276?

CVE-2007-5276 affects Opera Opera Browser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-5276?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2007-5276 published?

CVE-2007-5276 was published on 2007-10-08 and last updated on 2026-06-16.

CVE-2007-5276

CVE-2007-5276 is a medium-severity vulnerability in Opera Opera Browser with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Opera Opera Browser
Published: 2007-10-08
Last modified: 2026-06-16

Description

Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80.

Frequently asked questions

What is CVE-2007-5276?: Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80.
How severe is CVE-2007-5276?: CVE-2007-5276 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2007-5276 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-5276?: CVE-2007-5276 affects Opera Opera Browser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-5276?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-5276 published?: CVE-2007-5276 was published on 2007-10-08 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:opera:opera_browser:9.0:*:*:*:*:*:*:*

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