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  4. CVE 2026 78008 fireware os authenticated buffer overflow in
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Back to active CVEs
High · CVSS 8.6CVE-2026-78008

Fireware OS Authenticated Buffer Overflow in wgagentCVE-2026-78008

Answer in brief

CVE-2026-78008 records a High severity (CVSS 8.6) vulnerability in Fireware OS Authenticated Buffer Overflow in wgagent. The current sources do not mark it as known exploited. The current feed maps WatchGuard/Fireware OS (generic), WatchGuard/Fireware OS (generic), WatchGuard/Fireware OS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 27, 2026Updated Sep 3, 2026Source checked Oct 12, 2026First seen by HOL Aug 28, 2026Material review Sep 3, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.6
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps WatchGuard/Fireware OS (generic), WatchGuard/Fireware OS (generic), WatchGuard/Fireware OS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
WatchGuard/Fireware OSgeneric>=2025.0 <2026.2.2 || >=12.0 <12.12.22026.2.2, 12.12.2
WatchGuard/Fireware OSgeneric>=12.0 <12.5.2012.5.20
WatchGuard/Fireware OSgeneric>=2025.0 <2026.2.2 || >=12.0 <12.12.2 || >=2026.3 <2026.3.12026.2.2, 12.12.2, 2026.3.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for WatchGuard/Fireware OS, WatchGuard/Fireware OS, WatchGuard/Fireware OS.
  2. 2Review the reported fix. Source-reported solution: Fireware OS 2026.3.1, Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20

Evidence timeline and material changes

  1. Published upstream

    Aug 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 28, 2026

Sources and claim methodology

  • Source referencepsirt.watchguard.com
Upstream source description

A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Stack out-of-bounds write in the Goodix GT911 touch controller driver from an unvalidated device-reported touch point countAlso CWE-787
  • Unbounded variable-length array in fuel gauge syscall verifiers allows kernel stack overflow from user modeAlso CWE-787
  • Out-of-bounds write in the NXP MCUX TRNG entropy driver for non-word-multiple request lengthsAlso CWE-787
  • Plaintext Database Password Exposure in GV-E-Map Server V18.2.0ASame generic ecosystem
  • Channel tokens and organization API key exposed in API responsesSame generic ecosystem
  • zhayujie CowAgent Streaming Tool-Call Argument json.loads allocation of resourcesSame generic ecosystem

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Oct 12, 2026
References
1 linked source
Open source record