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CVE-2023-43766

22
FAUCET Score

CVE-2023-43766 is a local privilege escalation vulnerability affecting multiple WithSecure products, including Client Security, Server Security, and Elements Endpoint Protection across Windows, macOS, and Linux platforms. This flaw, stemming from the lhz archive unpack handler, carries a high CVSS score of 7.8, indicating that a low-privileged local attacker can achieve high impact on confidentiality, integrity, and availability with low attack complexity. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
12.0CPE matchmatch criteria
cpe:2.3:a:f-secure:linux_protection:12.0:*:*:*:*:*:*:*
12.0CPE matchmatch criteria
cpe:2.3:a:f-secure:linux_security_64:12.0:*:*:*:*:*:*:*
1.0.35-1CPE matchmatch criteria
cpe:2.3:a:f-secure:atlant:1.0.35-1:*:*:*:*:*:*:*
15.00CPE matchmatch criteria
cpe:2.3:a:f-secure:client_security:15.00:*:*:*:*:*:*:*
>= 17.0CPE matchmatch criteria
cpe:2.3:a:f-secure:elements_endpoint_protection:*:*:*:*:*:*:*:*

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
0.15%
Probability of exploitation in next 30 days
EPSS Percentile
4.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0015 is in the 21st percentile among its peer group of 17,070 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

withsecure.com / en/support/security-advisories
Vendor Advisory
withsecure.com / en/support/security-advisories/cve-2023-nnn4
Broken Link