A buffer overflow occurs in utilities/ymodem/ry_sy.c in RT-Thread through 5.0.2 because of an incorrect sprintf call or a missing '\0' character.
Conclusion & alert: CVE-2024-25394 is rated Low Risk (33.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.64%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.19% | 0.64% | +0.45% |
| 2 | 2026-04-15 | 0.15% | 0.19% | +0.04% |
| 3 | 2025-11-21 | — | 0.15% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 3.1 | MEDIUM |
|
2.8 | 1.4 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| URL | Tags |
|---|---|
| http://www.openwall.com/lists/oss-security/2024/03/05/1 | Mailing List |
| https://github.com/RT-Thread/rt-thread/issues/8291 | Issue Tracking |
| https://github.com/hnsecurity/vulns/blob/main/HNS-2024-05-rt-thread.txt | Third Party Advisory |
| https://seclists.org/fulldisclosure/2024/Mar/28 | Mailing List |
| https://security.humanativaspa.it/multiple-vulnerabilities-in-rt-thread-rtos/ | Third Party Advisory |
| http://seclists.org/fulldisclosure/2024/Mar/28 |