How severe is CVE-2026-28271?

CVE-2026-28271 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-28271 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28271?

CVE-2026-28271 affects Accellion Kiteworks. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28271?

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

Does CVE-2026-28271 have an EU (EUVD) identifier?

Yes. CVE-2026-28271 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9066.

When was CVE-2026-28271 published?

CVE-2026-28271 was published on 2026-02-27 and last updated on 2026-06-17.

CVE-2026-28271

CVE-2026-28271 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-350.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9066
Weakness: CWE-350
Affected product: Accellion Kiteworks
Published: 2026-02-27
Last modified: 2026-06-17

Description

Kiteworks is a private data network (PDN). Prior to version 9.2.0, a vulnerability in Kiteworks configuration functionality allows bypassing of SSRF protections through DNS rebinding attacks. Malicious administrators could exploit this to access internal services that should be restricted. Version 9.2.0 contains a patch for the issue.

Frequently asked questions

What is CVE-2026-28271?: Kiteworks is a private data network (PDN). Prior to version 9.2.0, a vulnerability in Kiteworks configuration functionality allows bypassing of SSRF protections through DNS rebinding attacks. Malicious administrators could exploit this to access internal services that should be restricted. Version 9.2.0 contains a patch for the issue.
How severe is CVE-2026-28271?: CVE-2026-28271 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-28271 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28271?: CVE-2026-28271 affects Accellion Kiteworks. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28271?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-28271 have an EU (EUVD) identifier?: Yes. CVE-2026-28271 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9066.
When was CVE-2026-28271 published?: CVE-2026-28271 was published on 2026-02-27 and last updated on 2026-06-17.

References

https://github.com/kiteworks/security-advisories/security/advisories/GHSA-rmfx-6h9w-fq87

Affected products (1)

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

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