How severe is CVE-2026-23635?

CVE-2026-23635 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-23635 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23635?

CVE-2026-23635 affects Accellion Kiteworks. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23635?

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

Does CVE-2026-23635 have an EU (EUVD) identifier?

Yes. CVE-2026-23635 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15540.

When was CVE-2026-23635 published?

CVE-2026-23635 was published on 2026-03-25 and last updated on 2026-06-17.

CVE-2026-23635

CVE-2026-23635 is a medium-severity vulnerability in Accellion Kiteworks with a CVSS 3.x base score of 6.5. 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-523.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-15540
Weakness: CWE-523
Affected product: Accellion Kiteworks
Published: 2026-03-25
Last modified: 2026-06-17

Description

Kiteworks is a private data network (PDN). In Kiteworks Secure Data Forms prior to version 9.2.1, a misconfiguration of the security attributes could potentially lead to Unprotected Transport of Credentials under certain circumstances. Upgrade Kiteworks to version 9.2.1 or later to receive a patch.

Frequently asked questions

What is CVE-2026-23635?: Kiteworks is a private data network (PDN). In Kiteworks Secure Data Forms prior to version 9.2.1, a misconfiguration of the security attributes could potentially lead to Unprotected Transport of Credentials under certain circumstances. Upgrade Kiteworks to version 9.2.1 or later to receive a patch.
How severe is CVE-2026-23635?: CVE-2026-23635 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-23635 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23635?: CVE-2026-23635 affects Accellion Kiteworks. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23635?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23635 have an EU (EUVD) identifier?: Yes. CVE-2026-23635 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15540.
When was CVE-2026-23635 published?: CVE-2026-23635 was published on 2026-03-25 and last updated on 2026-06-17.

References

https://github.com/kiteworks/security-advisories/security/advisories/GHSA-9hw2-6qp4-3v8f

Affected products (1)

cpe:2.3:a:accellion:kiteworks:*:*:*:*:*:*:*:*

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