CVE-2025-0276: HCL Software BigFix Modern Client Management · Protection Mechanism Failure
Affects HCL Software BigFix Modern Client ManagementSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:LExploitation evidence
Disclosed: evidence found.
CVE published 16 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| HCL Software BigFix Modern Client Management | Affected
| Fixed in– |
AI-suggested
- Immediately review and tighten Content Security Policy (CSP) configurations within BigFix MCM environments to restrict script and content sources to trusted domains only.
- Monitor vendor communications closely for patches or updates addressing CVE-2025-0276 and apply them promptly once available.
- Implement network-level controls such as web filtering and intrusion detection systems to detect and block attempts to exploit CSP weaknesses.
- Conduct thorough endpoint and network monitoring to identify unusual behaviors indicative of exploitation attempts, including unauthorized script execution or configuration changes.
- Educate IT and security teams about the nature of CSP and the importance of strict policy enforcement to prevent similar vulnerabilities.
- Consider deploying application-layer firewalls or CSP reporting tools to gain visibility into policy violations and potential attack vectors.
- For organizations unable to immediately patch, consider isolating or limiting access to BigFix MCM consoles and management interfaces to reduce exposure.
- Regularly audit and update security policies and endpoint management configurations to align with best practices and minimize attack surface.
Description
HCL BigFix Modern Client Management (MCM) 3.3 and earlier are vulnerable to certain insecure directives within the Content Security Policy (CSP). An attacker could trick users into performing actions by not properly restricting the sources of scripts and other content.