Security readout for executives and security teams
Plain-English summary
This CVE describes a memory-reading flaw in Nitro Free PDF Reader 12.0.0.112 when processing crafted PDF content. The available sources do not provide a CVSS score, confirmed patch, or active exploitation evidence.
Executive priority
Treat this as a targeted legacy software exposure question. Prioritize remediation if Nitro Free PDF Reader 12.0.0.112 remains installed, especially where users receive external PDFs.
Technical view
The issue is an out-of-bounds read in the JBIG2Decode library within npdf.dll, reported at CAPPDAnnotHandlerUtils::PDAnnotHandlerDestroyData2+0xa08a, triggered by crafted Unicode content. Impact details are limited in the provided sources.
Likely exposure
Exposure appears limited to environments running Nitro Free PDF Reader 12.0.0.112. The bundle does not identify other Nitro products, versions, platforms, or CPEs as affected.
Exploitation context
No CISA KEV listing is present, and the provided sources do not state active exploitation. Practical exploitation would likely require a crafted PDF or content opened by a vulnerable reader, but source evidence is limited.
Researcher notes
The public record is sparse: no CVSS vector, CWE mapping, named patch, or broad affected-version range is provided. Avoid extrapolating beyond Nitro Free PDF Reader 12.0.0.112 and the reported JBIG2Decode out-of-bounds read.
Mitigation direction
- Inventory endpoints for Nitro Free PDF Reader 12.0.0.112.
- Check Nitro vendor guidance for fixed or supported versions.
- Remove unsupported or unnecessary vulnerable PDF reader installations.
- Restrict opening untrusted PDFs on affected systems.
- Prefer managed, updated PDF readers for business workflows.
Validation and detection
- Confirm installed Nitro Free PDF Reader versions across managed endpoints.
- Review software inventory for npdf.dll tied to Nitro 12.0.0.112.
- Check EDR or crash telemetry for Nitro PDF Reader faults.
- Verify users handling untrusted PDFs are not using the affected version.
- Document whether vendor guidance or replacement software was applied.
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.
CVE-2019-19818 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://nafiez.github.io/security/vulnerability/remote/2019/12/12/multiple-nitro-pdf-vulnerability.htmlCVE reference · x_refsource_MISC
- https://github.com/nafiez/nafiez.github.io/blob/master/_posts/2019-12-12-multiple-nitro-pdf-vulnerability.mdCVE reference · x_refsource_MISC
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.