Security readout for executives and security teams
Plain-English summary
CVE-2019-25570 is a local denial-of-service issue in RealTerm Serial Terminal 2.0.0.70. A person with access to the application can crash it through the Port field. Business impact is limited to application availability, but it may disrupt serial-device operations where RealTerm is used for testing, support, or operations.
Executive priority
Treat as a targeted operational reliability issue, not an enterprise-wide remote compromise risk. Prioritize environments where RealTerm supports production, lab, or customer-facing serial-device workflows.
Technical view
RealTerm Serial Terminal 2.0.0.70 mishandles an overly long Port field value, causing an application crash. The CVSS v4 score is 6.8 with local attack vector, low complexity, no privileges, and user interaction present. The reported impact is high availability loss for the vulnerable application, with no confidentiality or integrity impact stated.
Likely exposure
Exposure is likely limited to endpoints or workstations where RealTerm Serial Terminal 2.0.0.70 is installed and locally used. Systems not running this version are not identified as affected in the provided sources.
Exploitation context
A public Exploit-DB reference exists, but the provided sources do not show active exploitation or CISA KEV listing. Exploitation requires local interaction with the application, reducing broad remote risk.
Researcher notes
The evidence describes a local application crash via malformed Port field input. Sources do not name a patched version or vendor mitigation. Avoid assuming broader memory corruption impact beyond denial of service unless additional analysis confirms it.
Mitigation direction
- Inventory RealTerm installations and identify version 2.0.0.70.
- Check RealTerm official pages and SourceForge files for vendor guidance or newer releases.
- Avoid using the affected version for critical serial-device operations where crashes cause disruption.
- Limit local access to systems where vulnerable RealTerm installations are required.
- Do not test crash behavior on production workstations.
Validation and detection
- Confirm installed RealTerm version on engineering, lab, and support workstations.
- Review helpdesk or endpoint logs for RealTerm crash reports.
- Map business processes that depend on RealTerm availability.
- Verify whether a newer vendor-provided release is approved and deployable.
- Document compensating controls if version 2.0.0.70 must remain in use.
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
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Open ATT&CK lookupCVE-2019-25570 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
- Medium
- CVSS
- 6.8 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/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.
CVSS vector scores
1 official scoreWe 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:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
6.8MediumVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-46390CVE reference · exploit
- Official Product HomepageCVE reference · product
- Product ReferenceCVE reference · product
- VulnCheck Advisory: RealTerm Serial Terminal 2.0.0.70 Denial of Service via Port FieldCVE reference · 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.
Improper Handling of Overlap Between Protected Memory Ranges
Improper Handling of Overlap Between Protected Memory Ranges represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.