How severe is CVE-2010-4376?

CVE-2010-4376 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2010-4376 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-4376?

CVE-2010-4376 primarily affects Realnetworks Realplayer. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-4376?

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

When was CVE-2010-4376 published?

CVE-2010-4376 was published on 2010-12-14 and last updated on 2026-06-16.

CVE-2010-4376

CVE-2010-4376 is a critical-severity vulnerability in Realnetworks Realplayer with a CVSS 2.0 base score of 9.3. 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-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Realnetworks Realplayer
Published: 2010-12-14
Last modified: 2026-06-16

Description

Heap-based buffer overflow in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.1, Mac RealPlayer 11.0 through 11.1, and Linux RealPlayer 11.0.2.1744 allows remote attackers to execute arbitrary code via a large Screen Width value in the Screen Descriptor header of a GIF87a file in an RTSP stream.

Frequently asked questions

What is CVE-2010-4376?: Heap-based buffer overflow in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.1, Mac RealPlayer 11.0 through 11.1, and Linux RealPlayer 11.0.2.1744 allows remote attackers to execute arbitrary code via a large Screen Width value in the Screen Descriptor header of a GIF87a file in an RTSP stream.
How severe is CVE-2010-4376?: CVE-2010-4376 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2010-4376 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-4376?: CVE-2010-4376 primarily affects Realnetworks Realplayer. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-4376?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2010-4376 published?: CVE-2010-4376 was published on 2010-12-14 and last updated on 2026-06-16.

References

Affected products (14)

cpe:2.3:a:realnetworks:realplayer:11.0:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:11.0.1:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:11.0.2:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:11.0.3:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:11.0.4:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:11.0.5:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:11.1:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer_sp:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer_sp:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer_sp:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer_sp:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer_sp:1.1:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer_sp:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:11.0.2.1744:*:*:*:*:*:*:*

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