What is CVE-2011-4261?

CVE-2011-4261 is a vulnerability in Realnetworks Realplayer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2011-11-24.

Is CVE-2011-4261 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Realnetworks Realplayer

CVE-2011-4261

RealNetworks RealPlayer before 15.0.0 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via crafted video dimensions in an MP4 file.

Vulnerability class: Buffer Overflow

Published 2011-11-24 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 9.3 (High). Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.028 (86.1th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

Realnetworks Realplayer — versions 4, 5, 6

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

service.real.com/realplayer/security/11182011_player/en/ (Vendor Advisory)

Frequently asked questions

What is CVE-2011-4261?: CVE-2011-4261 is a vulnerability in Realnetworks Realplayer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2011-11-24.
Is CVE-2011-4261 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.