How severe is CVE-2011-2948?

CVE-2011-2948 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-2948 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2948?

CVE-2011-2948 primarily affects Realnetworks Realplayer. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2948?

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-2011-2948 published?

CVE-2011-2948 was published on 2011-08-18 and last updated on 2026-06-16.

CVE-2011-2948

CVE-2011-2948 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: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Realnetworks Realplayer
Published: 2011-08-18
Last modified: 2026-06-16

Description

RealNetworks RealPlayer 11.0 through 11.1 and 14.0.0 through 14.0.5, RealPlayer SP 1.0 through 1.1.5, RealPlayer Enterprise 2.0 through 2.1.5, and Mac RealPlayer 12.0.0.1569 do not properly handle DEFINEFONT fields in SWF files, which allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a crafted file.

Frequently asked questions

What is CVE-2011-2948?: RealNetworks RealPlayer 11.0 through 11.1 and 14.0.0 through 14.0.5, RealPlayer SP 1.0 through 1.1.5, RealPlayer Enterprise 2.0 through 2.1.5, and Mac RealPlayer 12.0.0.1569 do not properly handle DEFINEFONT fields in SWF files, which allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a crafted file.
How severe is CVE-2011-2948?: CVE-2011-2948 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-2948 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2948?: CVE-2011-2948 primarily affects Realnetworks Realplayer. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2948?: 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-2011-2948 published?: CVE-2011-2948 was published on 2011-08-18 and last updated on 2026-06-16.

References

Affected products (24)

cpe:2.3:a:realnetworks:realplayer:11.0:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:11.1:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:14.0.1:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:14.0.2:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:14.0.3:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:14.0.4:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:14.0.5:*:*:*:*:*:*:*
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:2.0:*:enterprise:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:2.1.2:*:enterprise:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:2.1.3:*:enterprise:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:2.1.4:*:enterprise:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:2.1.5:*:enterprise:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:12.0.0.1569:*:mac_os:*:*:*:*:*

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