eParakstītājs 3.0 for Windows – remote code execution via unauthenticated auto-update
Summary
| CVE | CVE-2026-0392 |
|---|---|
| State | PUBLISHED |
| Assigner | ENISA |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-03 10:16:27 UTC |
| Updated | 2026-10-23 22:10:00 UTC |
| Description | eParakstītājs 3.0 for Windows before version 1.10.0 retrieves and executes its automatic updates over a channel that is not authenticated or integrity-protected. On each launch the application fetches an update descriptor (XML) over TLS but accepts any TLS certificate (a permissive TrustManager and a HostnameVerifier that always returns true), does not verify any digital signature on the update descriptor, and does not verify the Authenticode signature or a checksum of the downloaded installer before running it. A man-in-the-middle attacker able to redirect www.eparaksts.lv can serve a crafted update descriptor pointing to an attacker-controlled executable, which the client downloads and executes, resulting in arbitrary code execution on the victim host. |
Risk And Classification
Primary CVSS: v4.0 7.3 HIGH from a6d3dc9e-0591-4a13-bce7-0f5b31ff6158
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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
EPSS: 0.000860000 probability, percentile 0.002980000 (date 2026-10-23)
Problem Types: CWE-295 | CWE-347 | CWE-494 | CWE-494 CWE-494 Download of code without integrity check | CWE-295 CWE-295 Improper certificate validation | CWE-347 CWE-347 Improper verification of cryptographic signature
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | a6d3dc9e-0591-4a13-bce7-0f5b31ff6158 | Secondary | 7.3 | HIGH | CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 7.3 | HIGH | CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
CVSS v4.0 Breakdown
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Latvijas Valsts Radio Un Televzijas Centrs LVRTC | EParaksttjs 3.0 | affected 1.10.0 semver | Windows |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.eparaksts.lv/lv/par_mums/Jaunumi/Jauna_eParakstitajs_30_versija_1100 | a6d3dc9e-0591-4a13-bce7-0f5b31ff6158 | www.eparaksts.lv | |
| cvd.cert.lv/inbox/view/vuln-all-1689187061 | a6d3dc9e-0591-4a13-bce7-0f5b31ff6158 | cvd.cert.lv | |
| offseq.com/en/research/eparakstitajs-cve-2026-0392 | a6d3dc9e-0591-4a13-bce7-0f5b31ff6158 | offseq.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Nils Putniņš, OffSeq (SIA SEQ) (en)
Additional Advisory Data
Solutions
CNA: Update eParakstītājs 3.0 to version 1.10.0 or later, in which the update channel is authenticated and the downloaded installer is signature-verified.
Workarounds
CNA: Until updated, disable automatic updates and install new versions only from the official signed package obtained over a trusted network, verifying the Authenticode signature manually.