CVE-2026-96656

CVE Enrichment

CVSS: 8.6 HIGH
EPSS: 0.40%
EPSS Percentile: 32.31%
CISA KEV: Not listed

Description

Plex Media Server before 1.43.3.10861 allows an admin user to write arbitrary files that may be executed on load. The preference TranscoderH264Options is appended verbatim to x264's option string on every transcode. At startup, all .so files are run without signature, execute bit, or symbol checks.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: 9119a7d8-5eab-497f-8521-727c672e3725
Published: 24-Sep-2026 00:17
Last Modified: 30-Sep-2026 01:34
EPSS Date: 2026-10-19
CWE: CWE-73

CVSS Vector


            CVSS:4.0                            AV:N /
                            AC:L /
                            AT:N /
                            PR:H /
                            UI:N /
                            VC:H /
                            VI:H /
                            VA:H /
                            SC:N /
                            SI:N /
                            SA:N /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

Affected Products / Versions

plex / media_server
Version / affected range: * · before (exclusive) 1.43.0.10861
cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:*

References

Last enrichment sync: 20-Oct-2026 06:16
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

Tracked as CVE-2026-96652, CVE-2026-96654, CVE-2026-96655 and CVE-2026-96656, the flaws can be combined to run arbitrary code on an exposed server without valid credentials. Plex Exploit Chain Used Against Vulnerable Servers a Day After Disclosure

CVE (3)

Malware (1)

MITRE ATT&CK (2)

Vendors (1)

Products (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.