CVE-2026-40688: High severity Fortinet FortiWeb vulnerability
An out-of-bounds write vulnerability [CWE-787] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow a remote privileged attacker to execute arbitrary code or command via crafted HTTP requests.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Fortinet FortiWebto a version that resolves this vulnerability.Fixed in 7.4.12 - Upgrade
Upgrade
Fortinet FortiWebto a version that resolves this vulnerability.Fixed in 7.6.7 - Upgrade
Upgrade
Fortinet FortiWebto a version that resolves this vulnerability.Fixed in 8.0.4
Event History
Frequently Asked Questions
What is the severity of CVE-2026-40688?
CVE-2026-40688 is considered a critical vulnerability due to the potential for arbitrary code execution.
How do I fix CVE-2026-40688?
To mitigate CVE-2026-40688, upgrade Fortinet FortiWeb to the latest patched version.
What versions are affected by CVE-2026-40688?
CVE-2026-40688 affects Fortinet FortiWeb versions 8.0.0 to 8.0.3, 7.6.0 to 7.6.6, and 7.4.0 to 7.4.11.
What type of vulnerability is CVE-2026-40688?
CVE-2026-40688 is an out-of-bounds write vulnerability allowing attackers to execute unauthorized code.
Can CVE-2026-40688 be exploited remotely?
Yes, CVE-2026-40688 can potentially be exploited remotely, depending on the attack vector.