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CVE-2021-21892

CRITICALCVSS 9.9/10EPSS 30.44%

Last modified

CVE-2021-21892 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. A stack-based buffer overflow vulnerability exists in the Web Manager FsUnmount functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to remote code execution. EPSS estimates a 30.44% chance of exploitation in the next 30 days.

Description

A stack-based buffer overflow vulnerability exists in the Web Manager FsUnmount functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to remote code execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Metrics

CVSS 3.1
9.9/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
30.44%

98.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
LantronixPremierwave 2050 Firmware8.9.0.0R4

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-21892?
A stack-based buffer overflow vulnerability exists in the Web Manager FsUnmount functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to remote code execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.
How severe is CVE-2021-21892?
CVE-2021-21892 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 30.44% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21892?
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-2021-21892?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST