How severe is CVE-2025-20259?

CVE-2025-20259 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-20259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-20259?

CVE-2025-20259 affects Cisco Thousandeyes Endpoint Agent. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-20259?

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

Does CVE-2025-20259 have an EU (EUVD) identifier?

Yes. CVE-2025-20259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16882.

When was CVE-2025-20259 published?

CVE-2025-20259 was published on 2025-06-04 and last updated on 2026-06-17.

CVE-2025-20259

CVE-2025-20259 is a medium-severity vulnerability in Cisco Thousandeyes Endpoint Agent with a CVSS 3.x base score of 5.3. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-16882
Weakness: CWE-22
Affected product: Cisco Thousandeyes Endpoint Agent
Published: 2025-06-04
Last modified: 2026-06-17

Description

Multiple vulnerabilities in the update process of Cisco ThousandEyes Endpoint Agent for Windows could allow an authenticated, local attacker to delete arbitrary files on an affected device. These vulnerabilities are due to improper access controls on files that are in the local file system. An attacker could exploit these vulnerabilities by using a symbolic link to perform an agent upgrade that redirects the delete operation of any protected file. A successful exploit could allow the attacker to delete arbitrary files from the file system of the affected device.

Frequently asked questions

What is CVE-2025-20259?: Multiple vulnerabilities in the update process of Cisco ThousandEyes Endpoint Agent for Windows could allow an authenticated, local attacker to delete arbitrary files on an affected device. These vulnerabilities are due to improper access controls on files that are in the local file system. An attacker could exploit these vulnerabilities by using a symbolic link to perform an agent upgrade that redirects the delete operation of any protected file. A successful exploit could allow the attacker to delete arbitrary files from the file system of the affected device.
How severe is CVE-2025-20259?: CVE-2025-20259 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-20259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-20259?: CVE-2025-20259 affects Cisco Thousandeyes Endpoint Agent. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-20259?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-20259 have an EU (EUVD) identifier?: Yes. CVE-2025-20259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16882.
When was CVE-2025-20259 published?: CVE-2025-20259 was published on 2025-06-04 and last updated on 2026-06-17.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-te-endagent-filewrt-zNcDqNRJ

Affected products (1)

cpe:2.3:a:cisco:thousandeyes_endpoint_agent:*:*:*:*:*:*:*:*

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