OpenSSL CVE-2025-15467 Fortinet PSIRT Advisories Fortinet PSIRT Contact: Website: https://fortiguard.fortinet.com/faq/psirt-contact FG-IR-26-076 Final 1 1 2026-01-30T00:00:00 Current version 2026-01-30T00:00:00 2026-03-13T00:00:00 CVE-2025-15467Parsing CMS AuthEnvelopedData message with maliciously crafted AEAD parameters can trigger a stack buffer overflow. A stack buffer overflow may lead to a crash, causing Denial of Service, or potentially remote code execution. When parsing CMS AuthEnvelopedData structures that use AEAD ciphers such as AES-GCM, the IV (Initialization Vector) encoded in the ASN.1 parameters is copied into a fixed-size stack buffer without verifying that its length fits the destination. An attacker can supply a crafted CMS message with an oversized IV, causing a stack-based out-of-bounds write before any authentication or tag verification occurs. Applications and services that parse untrusted CMS or PKCS#7 content using AEAD ciphers (e.g., S/MIME AuthEnvelopedData with AES-GCM) are vulnerable. Because the overflow occurs prior to authentication, no valid key material is required to trigger it. While exploitability to remote code execution depends on platform and toolchain mitigations, the stack-based write primitive represents a severe risk.The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the CMS implementation is outside the OpenSSL FIPS module boundary.OpenSSL 3.6, 3.5, 3.4, 3.3 and 3.0 are vulnerable to this issue.OpenSSL 1.1.1 and 1.0.2 are not affected by this issue. None Execute unauthorized code or commands None https://fortiguard.fortinet.com/psirt/FG-IR-26-076 OpenSSL CVE-2025-15467 https://www.openwall.com/lists/oss-security/2026/01/27/10 https://www.openwall.com/lists/oss-security/2026/01/27/10 https://nvd.nist.gov/vuln/detail/CVE-2025-15467 https://nvd.nist.gov/vuln/detail/CVE-2025-15467 No FortiAP 7.6.3 FortiAP 7.6.2 FortiAP 7.6.1 FortiAP 7.6.0 FortiAP 7.4.6 FortiAP 7.4.5 FortiAP 7.4.4 FortiAP 7.4.3 FortiAP 7.4.2 FortiAP 7.4.1 FortiAP 7.4.0 FortiAP 7.2.6 FortiAP 7.2.5 FortiAP 7.2.4 FortiAP 7.2.3 FortiAP 7.2.2 FortiAP 7.2.1 FortiAP 7.2.0 FortiClientWindows 7.4.6 FortiClientWindows 7.4.5 FortiClientWindows 7.4.4 FortiClientWindows 7.4.3 FortiClientWindows 7.4.2 FortiClientWindows 7.4.1 FortiClientWindows 7.4.0 FortiClientWindows 7.2.14 FortiClientWindows 7.2.13 FortiClientWindows 7.2.12 FortiClientWindows 7.2.11 FortiClientWindows 7.2.10 FortiClientWindows 7.2.9 FortiClientWindows 7.2.8 FortiClientWindows 7.2.7 FortiClientWindows 7.2.6 FortiClientWindows 7.2.5 FortiClientWindows 7.2.4 FortiClientWindows 7.2.3 FortiClientWindows 7.2.2 FortiClientWindows 7.2.1 FortiClientWindows 7.2.0 FortiNAC-F 7.6.5 FortiNAC-F 7.6.4 FortiNAC-F 7.6.3 FortiNAC-F 7.6.2 FortiNAC-F 7.6.1 FortiNAC-F 7.6.0 FortiNAC-F 7.4.2 FortiNAC-F 7.4.1 FortiNAC-F 7.4.0 CVE-2025-15467 FortiAP-7.6.3 FortiAP-7.6.2 FortiAP-7.6.1 FortiAP-7.6.0 FortiAP-7.4.6 FortiAP-7.4.5 FortiAP-7.4.4 FortiAP-7.4.3 FortiAP-7.4.2 FortiAP-7.4.1 FortiAP-7.4.0 FortiAP-7.2.6 FortiAP-7.2.5 FortiAP-7.2.4 FortiAP-7.2.3 FortiAP-7.2.2 FortiAP-7.2.1 FortiAP-7.2.0 FortiClientWindows-7.4.6 FortiClientWindows-7.4.5 FortiClientWindows-7.4.4 FortiClientWindows-7.4.3 FortiClientWindows-7.4.2 FortiClientWindows-7.4.1 FortiClientWindows-7.4.0 FortiClientWindows-7.2.14 FortiClientWindows-7.2.13 FortiClientWindows-7.2.12 FortiClientWindows-7.2.11 FortiClientWindows-7.2.10 FortiClientWindows-7.2.9 FortiClientWindows-7.2.8 FortiClientWindows-7.2.7 FortiClientWindows-7.2.6 FortiClientWindows-7.2.5 FortiClientWindows-7.2.4 FortiClientWindows-7.2.3 FortiClientWindows-7.2.2 FortiClientWindows-7.2.1 FortiClientWindows-7.2.0 FortiNAC-F-7.6.5 FortiNAC-F-7.6.4 FortiNAC-F-7.6.3 FortiNAC-F-7.6.2 FortiNAC-F-7.6.1 FortiNAC-F-7.6.0 FortiNAC-F-7.4.2 FortiNAC-F-7.4.1 FortiNAC-F-7.4.0 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X https://fortiguard.fortinet.com/psirt/FG-IR-26-076 OpenSSL CVE-2025-15467 Reference> https://www.openwall.com/lists/oss-security/2026/01/27/10 https://www.openwall.com/lists/oss-security/2026/01/27/10 https://nvd.nist.gov/vuln/detail/CVE-2025-15467 https://nvd.nist.gov/vuln/detail/CVE-2025-15467