CVE-2021-29998
CRITICALCVSS 9.8/10EPSS 2.37%
Last modified
CVE-2021-29998 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in Wind River VxWorks before 6.5. There is a possible heap overflow in dhcp client.. EPSS estimates a 2.37% chance of exploitation in the next 30 days.
Description
An issue was discovered in Wind River VxWorks before 6.5. There is a possible heap overflow in dhcp client.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Windriver | Vxworks | < 6.5 |
| Siemens | Ruggedcom Win Subscriber Station Firmware | All versions |
| Siemens | Scalance X200-4 P Irt Firmware | All versions |
| Siemens | Scalance X201-3p Irt Firmware | All versions |
| Siemens | Scalance X201-3p Irt Pro Firmware | All versions |
| Siemens | Scalance X202-2 Irt Firmware | All versions |
| Siemens | Scalance X202-2p Irt Firmware | All versions |
| Siemens | Scalance X202-2p Irt Pro Firmware | All versions |
| Siemens | Scalance X204 Irt Firmware | All versions |
| Siemens | Scalance X204 Irt Pro Firmware | All versions |
| Siemens | Scalance X204-2 Firmware | All versions |
| Siemens | Scalance X204-2fm Firmware | All versions |
| Siemens | Scalance X204-2ld Firmware | All versions |
| Siemens | Scalance X204-2ld Ts Firmware | All versions |
| Siemens | Scalance X204-2ts Firmware | All versions |
| Siemens | Scalance X206-1 Firmware | All versions |
| Siemens | Scalance X206-1ld Firmware | All versions |
| Siemens | Scalance X208 Firmware | All versions |
| Siemens | Scalance X208 Pro Firmware | All versions |
| Siemens | Scalance X212-2 Firmware | All versions |
| Siemens | Scalance X212-2ld Firmware | All versions |
| Siemens | Scalance X216 Firmware | All versions |
| Siemens | Scalance X224 Firmware | All versions |
| Siemens | Scalance X300 Firmware | All versions |
| Siemens | Scalance X408 Firmware | All versions |
| Siemens | Scalance Xf201-3p Irt Firmware | All versions |
| Siemens | Scalance Xf202-2p Irt Firmware | All versions |
| Siemens | Scalance Xf204 Firmware | All versions |
| Siemens | Scalance Xf204 Irt Firmware | All versions |
| Siemens | Scalance Xf204-2 Firmware | All versions |
| Siemens | Scalance Xf204-2ba Irt Firmware | All versions |
| Siemens | Scalance Xf206-1 Firmware | All versions |
| Siemens | Scalance Xf208 Firmware | All versions |
| Siemens | Simatic Rf 181 Eip Firmware | All versions |
| Siemens | Simatic Rf 182c Firmware | All versions |
| Siemens | Sinamics Perfect Harmony Gh180 Firmware | >= 2015, < 2022 |
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-560465.pdfThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-910883.pdfThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-194-12Third Party Advisory, US Government Resource
- https://cert-portal.siemens.com/productcert/pdf/ssa-560465.pdfThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-910883.pdfThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-194-12Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-29998?
An issue was discovered in Wind River VxWorks before 6.5. There is a possible heap overflow in dhcp client.
How severe is CVE-2021-29998?
CVE-2021-29998 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.37% probability of exploitation in the next 30 days.
How do I fix CVE-2021-29998?
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-2021-29998?
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Scan your code nowSource: NVD / NIST