# CVE-2026-64200: Out Of Bounds Read during string conversion when parsing a .DSB file in DASYLab

Status: published. Published: 2026-09-03. Updated: 2026-11-11.

There is an out-of-bounds read vulnerability in DASYLab due to improper validation of user-supplied data.   This results in a read a past the end of an allocated heap buffer during string conversion.  Successful exploitation requires an attacker to get a user to open a specially crafted .DSB file.  This issue affects all versions before 2026.0.0.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- measX / DASYLab: ≥ 0; < 2026.0.0 (affected, custom). Source: CNA: NI

## Severity and prioritization

- CVSS 4.0: 8.5 (high); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: NI

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H; source: CNA: NI

- CISA KEV: No listing in collected sources

- EPSS: 0.16% as of 2026-11-10; percentile 4.96%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-125

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.measx.com/en/service/productsecurity/security-updates-for-measx-software/159-securityupdates/1070-out-of-bounds-read-vulnerabilities-in-dasylab-2.html (CNA: NI)

## Provenance

- CNA: NI: https://www.cve.org/CVERecord?id=CVE-2026-64200; retrieved 2026-11-11; source updated 2026-11-11

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-64200; retrieved 2026-11-11; source updated Not reported

Revision: fd8d6906affd47b6a384e0ff599bd5d0b53482ace052cf6c6579dadfa98bd6ed

Canonical: https://y2.dev/cve/CVE-2026-64200

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.