Integer overflow in OpenModSim leads to denial of service
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.
Summary
OpenModSim versions up to and including 1.11.0 contain an integer overflow (CWE-190) where an overflowing calculation produces a wrapped value that the program then uses. A remote attacker who sends no credentials or user interaction can crash the program, causing a denial of service.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
Integer overflow in OpenModSim (<=1.11.0), leading to denial of service
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for OpenModSim.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2025-66969
- 2026-10-18 Alias added: GHSA-rxjm-cvqw-hr88
- 2026-10-21 CVSS score added · CISA ADP
- 2026-10-21 Weakness changed · CISA ADP
- 2026-10-21 CISA SSVC decision points changed
References
Sources
- CVE-2025-66969 · CVE Program
- CVE-2025-66969 · NVD
- FIRST EPSS
- GHSA-rxjm-cvqw-hr88 · GitHub Advisory Database · CC BY 4.0
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