Which SIEM platforms have a CVE-2025-14733 detection rule?

df00tech provides CVE-2025-14733 (CVE-2025-14733: WatchGuard Firebox Out-of-Bounds Write Exploitation) detection queries for 7 SIEM platforms: Microsoft Sentinel / Defender, Splunk, Elastic Security (EQL), IBM QRadar (AQL), Sumo Logic CSE, Google Chronicle / SecOps, CrowdStrike LogScale (CQL).

What data sources are required to detect CVE-2025-14733: WatchGuard Firebox Out-of-Bounds Write Exploitation (CVE-2025-14733)?

Detecting CVE-2025-14733: WatchGuard Firebox Out-of-Bounds Write Exploitation requires the following data sources: CommonSecurityLog, Syslog, AzureActivity.

What severity and confidence is the CVE-2025-14733 detection?

The CVE-2025-14733 detection is rated critical severity with medium confidence.

What are common false positives for CVE-2025-14733?

Common false positives for CVE-2025-14733 include: Legitimate high-volume administrative activity to Firebox management interfaces during maintenance windows; Firmware update processes may trigger crash or restart log entries; Security scanning tools performing authorized vulnerability assessments against the device.

CVE-2025-14733 Detection: CVE-2025-14733: WatchGuard Firebox Out-of-Bounds Write Exploitation (KQL, SPL, Sigma + 5 SIEMs)

Microsoft Sentinel / Defender

kusto

let watchguard_mgmt_ports = dynamic([4117, 4118, 8080, 443]);
let timeframe = 24h;
union
(
    CommonSecurityLog
    | where TimeGenerated >= ago(timeframe)
    | where DeviceVendor =~ "WatchGuard" or DeviceProduct =~ "Firebox"
    | where Activity has_any ("crash", "exception", "core dump", "segfault", "out of bounds", "buffer", "overflow")
    | project TimeGenerated, DeviceVendor, DeviceProduct, Activity, SourceIP, DestinationIP, DeviceAction, AdditionalExtensions
    | extend AlertReason = "WatchGuard Firebox process anomaly indicative of memory corruption"
),
(
    CommonSecurityLog
    | where TimeGenerated >= ago(timeframe)
    | where DeviceVendor =~ "WatchGuard" or DeviceProduct =~ "Firebox"
    | where DestinationPort in (watchguard_mgmt_ports)
    | where DeviceAction in~ ("deny", "reject", "drop") == false
    | summarize ConnectionCount = count(), UniqueSourceIPs = dcount(SourceIP) by bin(TimeGenerated, 5m), DestinationIP, DestinationPort
    | where ConnectionCount > 100 or UniqueSourceIPs > 20
    | extend AlertReason = "High volume connections to WatchGuard management interface"
),
(
    Syslog
    | where TimeGenerated >= ago(timeframe)
    | where ProcessName has_any ("wgagent", "wgrd", "wguard", "httpd", "wgpcc")
    | where SyslogMessage has_any ("segfault", "SIGSEGV", "core dump", "out of bounds", "stack smashing", "buffer overflow", "heap corruption")
    | project TimeGenerated, Computer, ProcessName, SyslogMessage
    | extend AlertReason = "WatchGuard process crash or memory corruption signal"
)
| order by TimeGenerated desc

Detects WatchGuard Firebox exploitation attempts via process crash indicators, memory corruption signals in syslog, and anomalous management interface connection volumes consistent with CVE-2025-14733 exploitation.

critical severity medium confidence

Data Sources

CommonSecurityLog Syslog AzureActivity

Required Tables

CommonSecurityLog Syslog

False Positives

Legitimate high-volume administrative activity to Firebox management interfaces during maintenance windows
Firmware update processes may trigger crash or restart log entries
Security scanning tools performing authorized vulnerability assessments against the device
Network monitoring solutions generating high connection counts to management ports

Splunk

spl

index=* sourcetype IN ("watchguard", "watchguard:firebox", "syslog", "cisco:asa")
(
  (vendor="WatchGuard" OR product="Firebox" OR host="*firebox*")
  AND (
    (message IN ("*crash*", "*segfault*", "*SIGSEGV*", "*core dump*", "*out of bounds*", "*stack smashing*", "*buffer overflow*", "*heap corruption*"))
    OR (process IN ("wgagent", "wgrd", "wguard", "httpd", "wgpcc") AND severity IN ("critical", "alert", "emergency"))
  )
)
| eval alert_reason="WatchGuard Firebox memory corruption or crash indicator"
| eval threat_score=case(
    match(message, "(?i)exploit|shellcode|payload|heap spray"), 90,
    match(message, "(?i)segfault|SIGSEGV|core dump"), 75,
    match(message, "(?i)crash|exception|overflow"), 60,
    true(), 50
  )
| table _time, host, src_ip, dest_ip, dest_port, message, alert_reason, threat_score
| sort -threat_score, -_time
| union
  [search index=* sourcetype IN ("watchguard", "watchguard:firebox")
   (vendor="WatchGuard" OR product="Firebox")
   dest_port IN (443, 4117, 4118, 8080)
   | bucket _time span=5m
   | stats count AS conn_count, dc(src_ip) AS unique_sources BY _time, dest_ip, dest_port
   | where conn_count > 100 OR unique_sources > 20
   | eval alert_reason="High volume connections to WatchGuard management interface"
   | eval threat_score=70]

Identifies WatchGuard Firebox exploitation indicators including process crashes, memory corruption signals, and anomalous management interface traffic patterns associated with CVE-2025-14733.

critical severity medium confidence

Data Sources

WatchGuard firewall logs Syslog Network flow data

Required Sourcetypes

watchguard watchguard:firebox syslog

False Positives

Authorized vulnerability scanning or penetration testing against WatchGuard devices
Firmware upgrade processes generating crash or restart events
Load balancers or monitoring systems creating high connection counts to management ports
Legitimate administrative sessions from multiple administrators during incident response

Elastic Security (EQL)

eql

sequence by host.name with maxspan=10m
  [network where event.type == "connection" and
   (destination.port == 4117 or destination.port == 4118 or destination.port == 8080 or destination.port == 443) and
   (
     network.application == "watchguard" or
     host.name like~ "*firebox*" or
     host.name like~ "*watchguard*"
   )
  ] with runs=50
  [process where event.type == "end" and event.action == "process_stopped" and
   (
     process.name like~ "wgagent" or
     process.name like~ "wgrd" or
     process.name like~ "wguard" or
     process.name like~ "httpd"
   ) and
   process.exit_code != 0
  ]

Correlates high-volume network connections to WatchGuard management ports followed by unexpected process termination, indicating potential CVE-2025-14733 exploitation triggering an out-of-bounds write crash.

critical severity medium confidence

Data Sources

Elastic Endpoint Network packet capture Syslog

Required Tables

logs-endpoint.events.network-* logs-endpoint.events.process-* logs-system.syslog-*

False Positives

Planned maintenance causing process restarts coinciding with high network activity
Automated monitoring tools generating connection spikes before scheduled device reboots
Firmware updates causing service restarts with non-zero exit codes
Legitimate bulk administrative operations from management systems

IBM QRadar (AQL)

sql

SELECT
  DATEFORMAT(starttime, 'YYYY-MM-dd HH:mm:ss') AS event_time,
  sourceip,
  destinationip,
  destinationport,
  logsourcename(logsourceid) AS log_source,
  CATEGORYNAME(category) AS event_category,
  "username",
  UTF8(payload) AS raw_payload,
  magnitude
FROM events
WHERE
  LOGSOURCETYPENAME(devicetype) ILIKE '%watchguard%'
  AND (
    (
      UTF8(payload) ILIKE '%crash%'
      OR UTF8(payload) ILIKE '%segfault%'
      OR UTF8(payload) ILIKE '%SIGSEGV%'
      OR UTF8(payload) ILIKE '%core dump%'
      OR UTF8(payload) ILIKE '%out of bounds%'
      OR UTF8(payload) ILIKE '%buffer overflow%'
      OR UTF8(payload) ILIKE '%heap corruption%'
      OR UTF8(payload) ILIKE '%stack smashing%'
    )
    OR (
      destinationport IN (443, 4117, 4118, 8080)
      AND magnitude > 7
    )
  )
  AND LOGSOURCETYPENAME(devicetype) ILIKE '%watchguard%'
ORDER BY starttime DESC
LAST 24 HOURS

Queries QRadar for WatchGuard Firebox events containing memory corruption indicators or high-magnitude alerts on management ports, correlating with CVE-2025-14733 exploitation activity.

critical severity medium confidence

Data Sources

WatchGuard log source Network activity events

Required Tables

events

False Positives

High-magnitude events from legitimate security scanning tools authorized against Firebox devices
Device restart events following scheduled maintenance generating crash-like log entries
Firmware update processes producing abnormal exit codes and process termination messages
Monitoring systems creating high-volume connections to management interfaces

Sumo Logic CSE

sql

_sourceCategory=watchguard OR _sourceCategory=firewall/watchguard
| where (%"vendor"="WatchGuard" OR %"product"="Firebox" OR _sourceName matches "*firebox*")
| where (
    %"message" matches "*crash*" OR
    %"message" matches "*segfault*" OR
    %"message" matches "*SIGSEGV*" OR
    %"message" matches "*core dump*" OR
    %"message" matches "*out of bounds*" OR
    %"message" matches "*buffer overflow*" OR
    %"message" matches "*heap corruption*" OR
    %"message" matches "*stack smashing*" OR
    (%"dest_port" in ("443", "4117", "4118", "8080") AND %"severity" in ("critical", "alert", "emergency"))
  )
| eval threat_indicator = if(%"message" matches "*exploit*" OR %"message" matches "*shellcode*", "HIGH",
    if(%"message" matches "*segfault*" OR %"message" matches "*SIGSEGV*", "MEDIUM", "LOW"))
| count by _time, %"src_ip", %"dest_ip", %"dest_port", %"message", threat_indicator
| order by _count desc

Detects WatchGuard Firebox anomalies in Sumo Logic including memory corruption signals and high-severity management interface events consistent with CVE-2025-14733 exploitation.

critical severity medium confidence

Data Sources

WatchGuard firewall logs Syslog

Required Tables

watchguard firewall/watchguard

False Positives

Authorized penetration testing generating crash or overflow indicators in device logs
Scheduled firmware upgrades producing high-severity restart or process termination events
Network monitoring platforms causing elevated connection counts to management interfaces
Multiple administrators performing concurrent management operations

Google Chronicle / SecOps

yaral

rule watchguard_firebox_cve_2025_14733_exploitation {
  meta:
    author = "df00tech Detection Engineering"
    description = "Detects CVE-2025-14733 WatchGuard Firebox out-of-bounds write exploitation"
    severity = "CRITICAL"
    priority = "HIGH"
    reference = "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00027"
    yara_version = "YL2.0"
    rule_version = "1.0"

  events:
    (
      $e.metadata.vendor_name = "WatchGuard" nocase or
      $e.metadata.product_name = "Firebox" nocase or
      $e.principal.hostname = /.*firebox.*/i or
      $e.principal.hostname = /.*watchguard.*/i
    )
    and
    (
      (
        $e.metadata.description = /crash|segfault|SIGSEGV|core dump|out of bounds|buffer overflow|heap corruption|stack smashing/i
      )
      or
      (
        $e.target.port in (443, 4117, 4118, 8080) and
        $e.security_result.severity = "CRITICAL"
      )
    )

  condition:
    $e
}

Chronicle YARA-L rule detecting WatchGuard Firebox memory corruption events and high-severity management port activity consistent with CVE-2025-14733 exploitation.

critical severity medium confidence

Data Sources

WatchGuard UDM events Network telemetry

Required Tables

udm_events

False Positives

Authorized security assessments producing crash or corruption indicators in Firebox logs
Scheduled maintenance windows generating high-severity restart events on management ports
Automated configuration management tools connecting frequently to management interfaces
Firmware update processes triggering process termination with critical severity logs

CrowdStrike LogScale (CQL)

cql

#event_simpleName IN ("NetworkConnectIP4", "NetworkConnectIP6", "ProcessRollup2", "SyntheticProcessRollup2")
| $vendor = "WatchGuard" OR $product = "Firebox" OR ComputerName = /.*firebox.*/i OR ComputerName = /.*watchguard.*/i
| (
    CommandLine = /crash|segfault|SIGSEGV|core.dump|out.of.bounds|buffer.overflow|heap.corruption|stack.smashing/i
    OR
    (
      RemotePort IN [443, 4117, 4118, 8080]
      AND event_simpleName IN ("NetworkConnectIP4", "NetworkConnectIP6")
    )
  )
| groupby([ComputerName, UserName, RemoteAddressIP4, RemotePort, CommandLine])
| sort(count(), order=desc)

CrowdStrike Falcon query detecting WatchGuard Firebox network connections to management ports and process anomalies indicative of CVE-2025-14733 out-of-bounds write exploitation.

critical severity medium confidence

Data Sources

CrowdStrike Falcon EDR Network telemetry

Required Tables

NetworkConnectIP4 NetworkConnectIP6 ProcessRollup2

False Positives

Legitimate CrowdStrike-monitored systems performing authorized management of WatchGuard devices
Security operations tools connecting to Firebox management interfaces for health monitoring
Firmware update utilities triggering process-level events during planned maintenance
Authorized penetration testers running exploit simulations against WatchGuard infrastructure

Vulnerability Intelligence

CVE

Affected Software

Weakness (CWE)

Timeline

References & Proof of Concept

CVSS

What is CVE-2025-14733 CVE-2025-14733: WatchGuard Firebox Out-of-Bounds Write Exploitation?

MITRE ATT&CK

Data Sources

Required Tables

False Positives

Data Sources

Required Sourcetypes

False Positives

Data Sources

Required Tables

False Positives

Data Sources

Required Tables

False Positives

Data Sources

Required Tables

False Positives

Data Sources

Required Tables

False Positives

Data Sources

Required Tables

False Positives

Sigma rule & cross-platform mapping

Platform-specific guides for CVE-2025-14733

Testing Methodology

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