Critical severity · published May 17, 2021
CVE-2021-27734
Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users
9.8
CVSS
1.3%
EPSS
No
On KEV
Description
Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HH
Hirschmann Hios · Belden
08.1.00 before 08.6.00; 07.1.01; 07.1.02 · source: NVD
HI
Hisecos · Belden
03.3.00 through 03.5.01 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-27734
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-27734
Vendor Advisory
https://dam.belden.com/dmm3bwsv3/assetstream.aspx?assetid=12914&mediaformatid=50063&destinationid=10016
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