How severe is CVE-2025-26499?

CVE-2025-26499 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-26499 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-26499?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-26499 have an EU (EUVD) identifier?

Yes. CVE-2025-26499 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28977.

When was CVE-2025-26499 published?

CVE-2025-26499 was published on 2025-09-11 and last updated on 2026-06-17.

CVE-2025-26499

CVE-2025-26499 is a medium-severity vulnerability with a CVSS 3.x base score of 6.0. 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-270.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-28977
Weakness: CWE-270
Published: 2025-09-11
Last modified: 2026-06-17

Description

Under heavy system utilization a random race condition can occur during authentication or token refresh operation. This flaw allows one user to be granted a token intended for another user, resulting in impersonation until the session is ended. This flaw cannot be intentionally exploited due to the required concurring action by two users. However, if the event occurs a user would be inadvertently exposed to another user’s system rights and data access.

Frequently asked questions

What is CVE-2025-26499?: Under heavy system utilization a random race condition can occur during authentication or token refresh operation. This flaw allows one user to be granted a token intended for another user, resulting in impersonation until the session is ended. This flaw cannot be intentionally exploited due to the required concurring action by two users. However, if the event occurs a user would be inadvertently exposed to another user’s system rights and data access.
How severe is CVE-2025-26499?: CVE-2025-26499 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-26499 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-26499?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-26499 have an EU (EUVD) identifier?: Yes. CVE-2025-26499 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28977.
When was CVE-2025-26499 published?: CVE-2025-26499 was published on 2025-09-11 and last updated on 2026-06-17.

References

Other CWE-270 vulnerabilities

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CVE-2024-11263 — Critical (CVSS 9.3): When the Global Pointer (GP) relative addressing is enabled (CONFIG_RISCV_GP=y), the gp reg points at 0x800 bytes past…
CVE-2024-36513 — High (CVSS 8.2): A privilege context switching error vulnerability [CWE-270] in FortiClient Windows version 7.2.4 and below, version…
CVE-2017-2663 — High (CVSS 8.2): It was found that subscription-manager's DBus interface before 1.19.4 let unprivileged user access the…
CVE-2025-9408 — High (CVSS 8.1): System call entry on Cortex M (and possibly R and A, but I think not) has a race which allows very practical privilege…

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