What is the CVSS score of CVE-2020-36957?

CVE-2020-36957 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2020-36957?

Yes, a public proof-of-concept exploit is available for CVE-2020-36957. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2020-36957?

Within 24 hours: Inventory all systems running PDF Complete 3.5.310.2002 and isolate or restrict network access to affected machines. Within 7 days: Contact PDF Complete vendor for patch availability status and timeline; implement compensating controls listed below. Within 30 days: Either upgrade to patched version once available, uninstall the software if business-critical alternative exists, or implement full endpoint hardening and monitoring for exploitation attempts.

CVE-2020-36957

HIGH

Unquoted Search Path or Element (CWE-428)

2026-01-26 disclosure@vulncheck.com

Code Injection

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:00 vuln.today

PoC Detected

Jan 27, 2026 - 14:59 vuln.today

Public exploit code

CVE Published

Jan 26, 2026 - 18:16 nvd

HIGH 7.8

DescriptionCVE.org

PDF Complete 3.5.310.2002 contains an unquoted service path vulnerability in its pdfsvc.exe service configuration. Attackers can exploit the unquoted path to inject and execute malicious code with elevated LocalSystem privileges.