CVE-2025-0309

medium

Description

An insufficient validation on the server connection endpoint in Netskope Client allows local users to elevate privileges on the system. The insufficient validation allows Netskope Client to connect to any other server with Public Signed CA TLS certificates and send specially crafted responses to elevate privileges.

References

https://www.netskope.com/company/security-compliance-and-assurance/security-advisories-and-disclosures/netskope-security-advisory-nskpsa-2025-002

https://blog.amberwolf.com/blog/2025/august/advisory---netskope-client-for-windows---local-privilege-escalation-via-rogue-server/

https://blog.amberwolf.com/blog/2025/august/breaking-into-your-network-zer0-effort/

Details

Source: Mitre, NVD

Published: 2025-08-14

Updated: 2026-04-15

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 6

Vector: CVSS:4.0/AV:P/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:H/SI:H/SA:H

Severity: Medium

EPSS

EPSS: 0.00011