Security readout for executives and security teams
Plain-English summary
Wondershare PDFelement 5.2.9 has a Windows service configuration flaw that can let a local, already-authenticated attacker gain full system privileges. This is not a remote internet attack, but it can turn a low-privilege workstation foothold into complete device control.
Executive priority
Treat as high priority for endpoint remediation, especially where PDFelement 5.2.9 exists on user workstations. It is a local privilege escalation issue, so urgency depends on deployment breadth and existing endpoint compromise risk.
Technical view
CVE-2020-37254 is a CWE-428 unquoted service path issue in the WsAppService Windows service. The source bundle says local attackers can cause code execution as LocalSystem when the service restarts or the system reboots. Only Wondershare PDFelement 5.2.9 is identified as affected.
Likely exposure
Exposure is likely limited to Windows endpoints running Wondershare PDFelement 5.2.9 with WsAppService installed. Risk is higher on shared workstations, VDI images, and endpoints where low-privilege users or malware may already have local access.
Exploitation context
The bundle includes an ExploitDB reference, but KEV status is false and no cited source states active exploitation. Exploitation requires local access and a service restart or reboot condition, according to the provided description.
Researcher notes
Evidence identifies Wondershare PDFelement 5.2.9, WsAppService, CWE-428, local attack vector, low privileges required, and LocalSystem impact. The bundle does not name a fixed version, vendor advisory, or confirmed in-the-wild exploitation.
Mitigation direction
- Identify endpoints running Wondershare PDFelement 5.2.9.
- Check Wondershare guidance for a fixed or supported version.
- Upgrade, remove, or replace affected installations per vendor direction.
- Review whether WsAppService is required on managed endpoints.
- Prioritize systems with shared users or elevated business sensitivity.
Validation and detection
- Inventory installed PDFelement versions across Windows endpoints.
- Confirm whether WsAppService exists on suspected systems.
- Review service configuration for an unquoted executable path.
- Check endpoint controls for local write exposure in service path locations.
- Document affected hosts and remediation status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-428: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-37254 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.5 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9VulnCheckVulnerability scoring details
Base CVSS 4.0 score
8.5HighVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-40535CVE reference, VulnCheck · exploit
- Official Product HomepageCVE reference, VulnCheck · product
- VulnCheck Advisory: Wondershare PDFelement 5.2.9 Privilege Escalation via Unquoted Service PathCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Unquoted Search Path or Element
Unquoted Search Path or Element represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.