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CVE-2021-27765

25
FAUCET Score

CVE-2021-27765 describes a privilege escalation vulnerability affecting the BigFix Server API installer, specifically within the hcltech bigfix_platform. This flaw stems from the installer's reliance on an outdated InstallShield version, which contained CVE-2021-41526. With a CVSS score of 7.8 (High), a local attacker with low privileges could exploit this to achieve high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 9.5, <= 9.5.18CPE matchmatch criteria
cpe:2.3:a:hcltech:bigfix_platform:*:*:*:*:*:*:*:*
>= 10, <= 10.0.5CPE matchmatch criteria
cpe:2.3:a:hcltech:bigfix_platform:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.7MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.5
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 64th percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / mandiant/Vulnerability-Disclosures/blob/master/2022/MNDT-2022-0023/MNDT-2022-0023.md
ExploitThird Party Advisory
support.hcltechsw.com / csm
Vendor Advisory