Is CVE-2020-11558 actively exploited?

No active exploitation of CVE-2020-11558 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-11558 be exploited remotely?

Yes. CVE-2020-11558 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-11558?

CVE-2020-11558 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2020-11558

CWE-416Published: April 5, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An issue was discovered in libgpac.a in GPAC 0.8.0, as demonstrated by MP4Box. audio_sample_entry_Read in isomedia/box_code_base.c does not properly decide when to make gf_isom_box_del calls. This leads to various use-after-free outcomes involving mdia_Read, gf_isom_delete_movie, and gf_isom_parse_movie_boxes.

NVD Source

Technical Analysis

CVE-2020-11558 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.