CVE-2021-20988
HIGHCVSS 7.5/10EPSS 0.99%
Last modified
CVE-2021-20988 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.. EPSS estimates a 0.99% chance of exploitation in the next 30 days.
Description
In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hilscher | Rcx Rtos | < 2.1.14.1 |
| Pepperl-Fuchs | Ice1-16di-G60l-V1d Firmware | <= f10017 |
| Pepperl-Fuchs | Ice1-16dio-G60l-C1-V1d Firmware | <= f10017 |
| Pepperl-Fuchs | Ice1-16dio-G60l-V1d Firmware | <= f10017 |
| Pepperl-Fuchs | Ice1-8di8do-G60l-C1-V1d Firmware | <= f10017 |
| Pepperl-Fuchs | Ice1-8di8do-G60l-V1d Firmware | <= f10017 |
| Pepperl-Fuchs | Ice1-8iol-G30l-V1d Firmware | <= f10017 |
| Pepperl-Fuchs | Ice1-8iol-G60l-V1d Firmware | <= f10017 |
| Pepperl-Fuchs | Ice1-8iol-S2-G60l-V1d Firmware | <= f10017 |
References
- https://cert.vde.com/de-de/advisories/vde-2021-018Third Party Advisory
- https://cert.vde.com/de-de/advisories/vde-2021-018Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20988?
In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.
How severe is CVE-2021-20988?
CVE-2021-20988 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20988?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-20988?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST