CVE-2021-21876
CRITICALCVSS 9.1/10EPSS 2.69%
Last modified
CVE-2021-21876 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Specially-crafted HTTP requests can lead to arbitrary command execution in PUT requests. An attacker can make authenticated HTTP requests to trigger this vulnerability.. EPSS estimates a 2.69% chance of exploitation in the next 30 days.
Description
Specially-crafted HTTP requests can lead to arbitrary command execution in PUT requests. An attacker can make authenticated HTTP requests to trigger this vulnerability.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Lantronix | Premierwave 2050 Firmware | 8.9.0.0 | R4 |
References
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1315Exploit, Third Party Advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1315Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-21876?
Specially-crafted HTTP requests can lead to arbitrary command execution in PUT requests. An attacker can make authenticated HTTP requests to trigger this vulnerability.
How severe is CVE-2021-21876?
CVE-2021-21876 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 2.69% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21876?
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.
Are you affected by CVE-2021-21876?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST