opnsense core
Published Atomicorp research notes for CVEs affecting opnsense core where WAF protections were observed during testing or engineering review.
These notes are not intended to represent the full set of vulnerabilities mitigated by Atomicorp products and should not be interpreted as a coverage matrix, certification list, or census of protected CVEs.
Atomicorp WAF protections are primarily designed around attack techniques and exploit behaviors rather than individual vulnerability identifiers. A published research note documents a positive research finding related to that CVE. If a CVE is absent from these notes, no conclusion should be drawn about protection status.
| CVE | Vulnerability | CVSS | Severity | Rules Observed |
|---|---|---|---|---|
| CVE-2026-57155 | OPNsense: Root RCE via Arbitrary File Write in GeoIP Alias Importer | 9.9 (v3.1) | Critical | 340014 , 340023 , 340029 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 393655 |
| CVE-2026-53581 | ntp: write path traversal | 9.0 (v3.1) | Critical | 340007 , 344360 , 390709 |
| CVE-2026-58390 | OPNsense: Stored XSS to root RCE via OpenVPN client common_name in status views | 8.0 (v3.1) | High | 333140 , 333141 , 340087 , 340095 , 340099 , 340147 , 340148 , 341099 , 341256 , 341266 , 342259 , 346755 , 350147 , 350148 |
| CVE-2026-58391 | OPNsense: Stored XSS in Firewall Rules/NAT pages via a HTML-attribute breakout | 5.4 (v3.1) | Medium | 340014 , 340023 , 340029 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 393655 |
| CVE-2026-58392 | OPNsense: Stored XSS in Services: NTP GPS | 5.4 (v3.1) | Medium | 333140 , 333141 , 340095 , 340147 , 340148 , 341256 , 342259 , 346755 , 350147 , 350148 |
| CVE-2026-58394 | OPNsense: Stored XSS in Administration Settings via Certificate Description | 5.2 (v3.1) | Medium | 333140 , 333141 , 342259 |