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CVE-2026-55897

CVE-2026-55897

waiting for further signalsZero needs more public information before it can validate it.

GHSA-vj96-f37g-37f6 ↗EUVD-2026-84101 ↗

no check availablenot proven exploitable
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).−97dkevAttacks confirmed in the real world.
openwrt luci:luci-app-advanced-reboot OpenWrt LuCI master and openwrt-25.12 snapshots containing luci-app-advanced-reboot ACL with /bin/sh: [ "list"; "exec" ]; including tested OpenWrt SNAPSHOT r34693-4271b0b0b4. openwrt-24.10 and openwrt-23.05 did not contain this specific grant when checked.
fixed in None known as of 2026-06-15
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
ETK-2026-2392Zero's internal tracking ID, independent of the CVE number., permanent identifier
cvss8.8cna vendorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
25msince last run
29mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = trigger signal
public poc−3.2motrigger signal (cve.org) +0mowaiting for further signals+1.0mo
−3mo
−2mo
−1mo
0

description

luci-app-advanced-reboot before version 1.1.2-6 assigns its read-level RPC ACL permission to invoke a general-purpose shell. A user authenticated with a delegated LuCI/rpcd session holding that permission can execute commands with root privileges; builds that do not grant shell execution through this ACL are not affected.

mitigation

Upgrade luci-app-advanced-reboot to None known as of 2026-06-15 or later.

fixed in None known as of 2026-06-15

check
no
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
yes, low privileges
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
29m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-09-21 19:29Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
−97d
Δ to kevAttacks confirmed in the real world.
–

outcome

Contextual: an exploit technique exists, but no deterministic check could cover this one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-09-21 19:29Z
  2. 2026-09-21 19:29Z
  3. 2026-09-21 19:29Z

this entry in the feed

GET /api/v1/feed/CVE-2026-55897

{
  "etk_id": "ETK-2026-2392",
  "cve_id": "CVE-2026-55897",
  "display_id": "CVE-2026-55897",
  "ghsa_id": "GHSA-vj96-f37g-37f6",
  "euvd_id": "EUVD-2026-84101",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Shell execution authorization flaw in luci-app-advanced-reboot",
  "summary": "luci-app-advanced-reboot before version 1.1.2-6 assigns its read-level RPC ACL permission to invoke a general-purpose shell. A user authenticated with a delegated LuCI/rpcd session holding that permission can execute commands with root privileges; builds that do not grant shell execution through this ACL are not affected.",
  "mitigation": "Upgrade luci-app-advanced-reboot to None known as of 2026-06-15 or later.",
  "vendor": "openwrt luci",
  "product": "openwrt luci:luci-app-advanced-reboot",
  "affected": [
    {
      "affected_notes": [
        "OpenWrt LuCI master and openwrt-25.12 snapshots containing luci-app-advanced-reboot ACL with /bin/sh: [ \"list\"",
        "\"exec\" ]",
        "including tested OpenWrt SNAPSHOT r34693-4271b0b0b4. openwrt-24.10 and openwrt-23.05 did not contain this specific grant when checked."
      ],
      "affected_ranges": [],
      "ecosystem": "openwrt luci",
      "fixed_versions": [
        "None known as of 2026-06-15"
      ],
      "package_name": "luci-app-advanced-reboot",
      "purl": null
    }
  ],
  "cwes": [
    78
  ],
  "cvss_score": 8.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 29.44295465,
  "t0_at": "2026-09-21T19:29:37.003000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-06-16T22:11:38+00:00",
      "days": -96.88748846064814,
      "is_lower_bound": false,
      "measured_at": "2026-09-21T19:29:37.003000+00:00",
      "url": "https://github.com/openwrt/luci/security/advisories/GHSA-vj96-f37g-37f6"
    },
    "trigger_signal": {
      "at": "2026-09-21T19:29:37.003000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-21T19:29:37.003000+00:00",
      "url": "https://github.com/openwrt/luci/security/advisories/GHSA-vj96-f37g-37f6"
    }
  }
}

published 2026-10-22 05:16Z
last change 2026-10-22 05:46Z

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