Strix
26.1K

CVE-2021-21894

CRITICALCVSS 9.1/10EPSS 2.40%

Last modified

CVE-2021-21894 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. A directory traversal vulnerability exists in the Web Manager FsTFtp functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to arbitrary file overwrite FsTFtp file disclosure. EPSS estimates a 2.40% chance of exploitation in the next 30 days.

Description

A directory traversal vulnerability exists in the Web Manager FsTFtp functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to arbitrary file overwrite FsTFtp file disclosure. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Metrics

CVSS 3.1
9.1/10

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

EPSS Probability
2.40%

81.9th 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-2021-21894?
A directory traversal vulnerability exists in the Web Manager FsTFtp functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to arbitrary file overwrite FsTFtp file disclosure. An attacker can make an authenticated HTTP request to trigger this vulnerability.
How severe is CVE-2021-21894?
CVE-2021-21894 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 2.40% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21894?
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-2021-21894?

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

Scan your code now

Source: NVD / NIST