InfoSecBulletin Cybersecurity for mankind
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added two high-severity security flaws affecting Broadcom Brocade Fabric OS and Commvault Web Server to its Known Exploited Vulnerabilities (KEV) catalog on Monday due to evidence of active exploitation.
The vulnerabilities in question are listed below:
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CVE-2025-43859
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CVE-2025-1976 (CVSS score: 8.6): A code injection vulnerability in Broadcom Brocade Fabric OS enables a local user with admin rights to run arbitrary code with full root access.
CVE-2025-3928 (CVSS score: 8.7): a vulnerability in the Commvault Web Server that lets an authenticated attacker run malicious scripts.
“Exploiting this vulnerability requires a bad actor to have authenticated user credentials within the Commvault Software environment,” Commvault said in an advisory released in February 2025.
“Unauthenticated access is not exploitable. For software customers, this means your environment must be: (i) accessible via the internet, (ii) compromised through an unrelated avenue, and (iii) accessed leveraging legitimate user credentials.”
The vulnerability affects the following Windows and Linux versions :
11.36.0 – 11.36.45 (Fixed in 11.36.46)
11.32.0 – 11.32.88 (Fixed in 11.32.89)
11.28.0 – 11.28.140 (Fixed in 11.28.141)
11.20.0 – 11.20.216 (Fixed in 11.20.217)
CVE-2025-1976 is a vulnerability in IP address validation that allows a local user with admin privileges to execute arbitrary code with root access on Fabric OS versions 9.1.0 to 9.1.1d6. This issue is fixed in version 9.1.1d7.
“This vulnerability can allow the user to execute any existing Fabric OS command or can also be used to modify the Fabric OS itself, including adding their own subroutines,” Broadcom noted in a bulletin published on April 17, 2025.
“Even though achieving this exploit first requires valid access to a role with admin privileges, this vulnerability has been actively exploited in the field.”
Currently, there is no public information on how these vulnerabilities have been used in attacks, the extent of those attacks, or who is responsible.
FCEB agencies should install patches for the Commvault Web Server by May 17, 2025, and for Broadcom Brocade Fabric OS by May 19, 2025.
