How severe is CVE-2025-12779?

CVE-2025-12779 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-12779 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-12779?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-12779 have an EU (EUVD) identifier?

Yes. CVE-2025-12779 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37961.

When was CVE-2025-12779 published?

CVE-2025-12779 was published on 2025-11-05 and last updated on 2026-06-17.

CVE-2025-12779

CVE-2025-12779 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-497.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.8
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-37961
Weakness: CWE-497
Published: 2025-11-05
Last modified: 2026-06-17

Description

Improper handling of the authentication token in the Amazon WorkSpaces client for Linux, versions 2023.0 through 2024.8, may expose the authentication token for DCV-based WorkSpaces to other local users on the same client machine. Under certain circumstances, a local user may be able to extract another local user's authentication token from the shared client machine and access their WorkSpace. To mitigate this issue, users should upgrade to the Amazon WorkSpaces client for Linux version 2025.0 or later.

Frequently asked questions

What is CVE-2025-12779?: Improper handling of the authentication token in the Amazon WorkSpaces client for Linux, versions 2023.0 through 2024.8, may expose the authentication token for DCV-based WorkSpaces to other local users on the same client machine. Under certain circumstances, a local user may be able to extract another local user's authentication token from the shared client machine and access their WorkSpace. To mitigate this issue, users should upgrade to the Amazon WorkSpaces client for Linux version 2025.0 or later.
How severe is CVE-2025-12779?: CVE-2025-12779 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-12779 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-12779?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-12779 have an EU (EUVD) identifier?: Yes. CVE-2025-12779 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37961.
When was CVE-2025-12779 published?: CVE-2025-12779 was published on 2025-11-05 and last updated on 2026-06-17.

References

Other CWE-497 vulnerabilities

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