Is CVE-2026-5228 in the CISA KEV catalog?

No. CVE-2026-5228 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-5228?

CVE-2026-5228 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2026-5228?

CVE-2026-5228 has an EPSS score of 0.24% (15th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2026-5228

HIGH

8.8

CVSS v3

NVD

Description

Improper Access Control, Missing Authorization vulnerability in Kurt Software Studio WriteUp Mobile App allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects WriteUp Mobile App: from 1.3.0 through 04062026.

CWE-284Improper Access Control CWE-862Missing Authorization

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.24%probability of exploitation in 30 days

15thpercentile

Low risk: more likely to be exploited than 15% of all known CVEs.

References

https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0310

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-04.