EUVD-2026-55632
GHSA-cwph-2586-4qwc
Severity by source
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local file-parsing vector with required user interaction; AC:H reflects AT:P prerequisite of a specifically crafted document; integrity-only impact with no confidentiality or availability consequence.
Primary rating from Vendor (ENISA).
CVSS VectorVendor: ENISA
Lifecycle Timeline
2DescriptionCVE.org
Improper verification of cryptographic signature and Improper Check for Unusual or Exceptional Conditions vulnerability in Estonian Information System Authority (RIA) libdigidocpp, DigiDoc4, DigiDoc on Android, and DigiDoc on iOS. This issue affects libdigidocpp: from 4.1.0 before 4.2.1; DigiDoc4: from 4.7.0 before 4.8.2; DigiDoc on Android: from 2.7.0 before 2.7.2; DigiDoc on iOS: from 2.8.0 before 2.8.1.
AnalysisAI
Improper cryptographic signature verification in Estonian RIA's libdigidocpp core library and its consumer applications - DigiDoc4, DigiDoc for Android, and DigiDoc for iOS - enables bypassing of XAdES signature validity checks through unhandled exceptional conditions during BDOC container parsing. Affected versions span libdigidocpp 4.1.0-4.2.0, DigiDoc4 4.7.0-4.8.1, DigiDoc Android 2.7.0-2.7.1, and DigiDoc iOS 2.8.0, all of which have vendor-released patches. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively open (UI:A) a maliciously crafted BDOC 2.1 or ASiC-E document using an unpatched DigiDoc client - specifically DigiDoc4 desktop 4.7.0-4.8.1, DigiDoc Android 2.7.0-2.7.1, or DigiDoc iOS 2.8.0 - on a local device (AV:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 4.4 Medium reflects real exploitation constraints: local attack vector (AV:L), mandatory active user interaction (UI:A), and specific attack prerequisites (AT:P) collectively prevent opportunistic or mass exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is to upgrade to patched releases immediately: libdigidocpp 4.2.1 or later, DigiDoc4 4.8.2 or later, DigiDoc for Android 2.7.2 or later, and DigiDoc for iOS 2.8.1 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
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