How severe is CVE-2010-4377?

CVE-2010-4377 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2010-4377 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-4377?

CVE-2010-4377 primarily affects Realnetworks Realplayer. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-4377?

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-2010-4377 published?

CVE-2010-4377 was published on 2010-12-14 and last updated on 2026-06-16.

CVE-2010-4377

CVE-2010-4377 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: 7% (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 1.1.5, Mac RealPlayer 11.0 through 12.0.0.1444, and Linux RealPlayer 11.0.2.1744 allows remote attackers to execute arbitrary code by specifying many subbands in cook audio codec information in a Real Audio file.

Frequently asked questions

What is CVE-2010-4377?: Heap-based buffer overflow in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.5, Mac RealPlayer 11.0 through 12.0.0.1444, and Linux RealPlayer 11.0.2.1744 allows remote attackers to execute arbitrary code by specifying many subbands in cook audio codec information in a Real Audio file.
How severe is CVE-2010-4377?: CVE-2010-4377 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2010-4377 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-4377?: CVE-2010-4377 primarily affects Realnetworks Realplayer. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-4377?: 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-2010-4377 published?: CVE-2010-4377 was published on 2010-12-14 and last updated on 2026-06-16.

References

Affected products (19)

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_sp:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer_sp:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer_sp:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer_sp:1.1.5:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:12.0.0.1444:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:11.0.2.1744:*:*:*:*:*:*:*

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