High severity · published Mar 10, 2021
CVE-2021-3310
Western Digital My Cloud OS 5 devices before 5.10.122 mishandle Symbolic Link Following on SMB and AFP shares
7.8
CVSS
1%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MY Cloud OS · Westerndigital
before 5.10.122 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3310
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3310
Vendor Advisory
https://www.westerndigital.com/support/productsecurity/wdc-21002-my-cloud-firmware-version-5-10-122
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-277/
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