CVE-2026-17539
Medium5.9RTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a NULL pointer dereference in the last entry of the enhanced message queue. This can cause a BCI_IEC104 fatal write error, resulting in connection interruption and restart, and ultimately a denial of service for bidirectional IEC 60870-5-104 communication.
- CVSS
- 5.9v3.1
- EPSS (exploit probability)
- 0.3%19th pct
- CISA KEV
- Not listed
EPSS trendFIRST daily scores, last 90 days
Daily values
| Score date | EPSS | Percentile |
|---|---|---|
| 2026-10-20 | 0.3% | 18.6% |
| 2026-10-19 | 0.3% | 18.6% |
| 2026-10-18 | 0.3% | 18.5% |
| 2026-10-16 | 0.3% | 18.5% |
| 2026-10-15 | 0.3% | 18.5% |
| 2026-10-14 | 0.3% | 18.4% |
| 2026-10-13 | 0.3% | 18.3% |
| 2026-10-12 | 0.3% | 18.3% |
| 2026-10-11 | 0.3% | 18.3% |
| 2026-10-10 | 0.3% | 18.2% |
| 2026-10-09 | 0.3% | 18.2% |
| 2026-10-08 | 0.3% | 18.2% |
| 2026-10-07 | 0.3% | 18.1% |
| 2026-10-06 | 0.3% | 18.1% |
| 2026-10-05 | 0.3% | 18.0% |
| 2026-10-04 | 0.3% | 18.0% |
| 2026-10-03 | 0.3% | 18.0% |
| 2026-10-02 | 0.3% | 18.0% |
| 2026-10-01 | 0.3% | 17.9% |
| 2026-09-30 | 0.3% | 17.9% |
| 2026-09-29 | 0.3% | 17.8% |
| 2026-09-27 | 0.3% | 17.8% |
| 2026-09-26 | 0.3% | 17.8% |
| 2026-09-25 | 0.3% | 17.7% |
| 2026-09-24 | 0.3% | 17.6% |
| 2026-09-23 | 0.4% | 28.8% |
| 2026-09-22 | 0.4% | 28.8% |
| 2026-09-21 | 0.4% | 28.7% |
| 2026-09-20 | 0.4% | 28.8% |
| 2026-09-19 | 0.4% | 28.8% |
| 2026-09-18 | 0.4% | 28.8% |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H