CVE-2026-57155

criticalpriority · track · 10EPSS 0.009 · 58 %ileexploit · PoCDE

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.86% (58th) EPSS

CVSS 9.9 · critical

Is it mine?

2 products

Check your exposure

Who says so?

1 sources

cert_bund

EPSS · scored 2026-10-27

OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the Firewall Alias GeoIP importer's process_zip() and process_gzip() paths in src/opnsense/scripts/filter/lib/alias/geoip.py use an unvalidated CSV country_code value to construct output filenames below /usr/local/share/GeoIP/alias. A user with Firewall Alias Edit privilege can configure an attacker-controlled GeoIP source URL and supply an archive whose country code traverses into another existing directory, causing attacker-controlled content to be written as root with an -IPv4 or -IPv6 suffix. A crafted newsyslog fragment and oversized log file can use the default hourly root cron job to execute commands as root, resulting in complete firewall compromise. This issue is fixed in version 26.1.11.

cvss

Technical severity, 0–10. One row per scoring source.

9.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · security-advisories@github.comexploitability 3.1 · impact 6

v3.19.4criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USprimaryCWE-73USprimaryCWE-78USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

babyshen/CVE-2026-57155OPNsense Root RCE (CVE-2026-57155)PoC · poc_in_github

affected products (2)

Products and version ranges known to be affected.

Open Source OPNsense< 26.1.11cert_bundDE
Open Source Open Source OPNsense <26.1.11< 26.1.11cert_bundDE

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2177OPNsense: Mehrere SchwachstellenDeutsch2026-07-01csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in OPNsense ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen, um Sicherheitsvorkehrungen zu umgehen, um einen Cross-Site Scripting Angriff durchzuführen, um Dateien zu manipulieren, um Informationen offenzulegen, und um einen Denial of Service Angriff durchzuführen.

sources

Which sources assert this record, and when.

cert_bund NVD CVE.org MITRE

published 2026-10-15modified 2026-10-15

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+21071 more

references (4) nvd

External citations — patches, advisories, analysis.

scry

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