Security readout for executives and security teams
Plain-English summary
OpenText RightFax uses .NET Remoting in a way that includes known security weaknesses. If the remoting service is reachable over the network, an unauthenticated attacker may be able to compromise confidentiality, integrity, and availability. This is critical for organizations that expose RightFax services beyond tightly controlled internal networks.
Executive priority
Treat as urgent if RightFax is business-critical or reachable from broad networks. Prioritize exposure reduction immediately, then follow OpenText guidance for remediation. Lack of confirmed exploitation lowers certainty, not severity.
Technical view
CVE-2025-15610 affects OpenText RightFax versions 16.6, 20.2, 21.2, 22.2, 23.4, 24.4, and 25.4. The CVE maps to CWE-502 and describes risk from .NET Remoting when remoting ports are accessible. CVSS 4.0 is 9.3 with network attack vector, low complexity, no privileges, and no user interaction.
Likely exposure
Exposure is most likely where RightFax .NET Remoting ports are reachable from untrusted networks, broad internal networks, VPN users, or partner connections. Systems isolated behind strict firewall rules are materially less exposed, but still need vendor review.
Exploitation context
The provided sources do not state active exploitation, and this CVE is not marked as CISA KEV in the supplied data. The risk remains high because the issue is unauthenticated, network-reachable, and tied to unsafe deserialization class weakness.
Researcher notes
Public detail is limited. The CVE identifies .NET Remoting exposure and CWE-502 but does not provide port numbers, vulnerable components, or patch identifiers in the supplied bundle. Avoid assumptions; validate against OpenText KB0861863 and local RightFax architecture.
Mitigation direction
- Review OpenText KB0861863 and apply any vendor-prescribed update or configuration change.
- Restrict RightFax remoting ports to only required trusted systems.
- Block internet and broad internal access to remoting services.
- Segment RightFax servers from general user and partner networks.
- Monitor OpenText advisories for updated remediation details.
Validation and detection
- Inventory RightFax servers and confirm affected version presence.
- Identify whether .NET Remoting services are enabled.
- Verify remoting ports are not reachable from untrusted networks.
- Review firewall rules, VPN access, and partner connectivity paths.
- Check OpenText guidance for version-specific validation steps.
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-502: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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 lookupCVE-2025-15610 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
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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.
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:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
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.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.