CVE-2021-3310

Description

Western Digital My Cloud OS 5 devices before 5.10.122 mishandle Symbolic Link Following on SMB and AFP shares. This can lead to code execution and information disclosure (by reading local files).

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.15% Top 25%
Vendor Advisory westerndigital.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.westerndigital.com/support/productsecurity/wdc-21002-my-cloud-firmware-version-5-10-122 vendor advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-277/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-3310?
CVE-2021-3310 has been scored as a high severity vulnerability.
How to fix CVE-2021-3310?
To fix CVE-2021-3310, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3310 being actively exploited in the wild?
It is possible that CVE-2021-3310 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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