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CVE-2021-3439

25
FAUCET Score

CVE-2021-3439 is a high-severity vulnerability affecting the BIOS firmware of certain HP Workstation products. It allows a local, low-privileged attacker to achieve high impact on confidentiality, integrity, and availability of the system. While firmware updates are available to mitigate this issue, there is currently no public exploit code, Metasploit modules, or evidence of active exploitation, and it has garnered minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< f.52CPE matchmatch criteria
cpe:2.3:o:hp:340_g3_firmware:*:*:*:*:*:*:*:*
< f.62CPE matchmatch criteria
cpe:2.3:o:hp:340_g4_firmware:*:*:*:*:*:*:*:*
< f.52CPE matchmatch criteria
cpe:2.3:o:hp:346_g3_firmware:*:*:*:*:*:*:*:*
< f.50CPE matchmatch criteria
cpe:2.3:o:hp:346_g4_firmware:*:*:*:*:*:*:*:*
< f.52CPE matchmatch criteria
cpe:2.3:o:hp:348_g3_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.17%
Probability of exploitation in next 30 days
EPSS Percentile
7.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0017 is in the 29th percentile among its peer group of 17,061 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

support.hp.com / us-en/document/ish_3982318-3982351-16/hpsbhf03735
PatchVendor Advisory