CVE-2025-62675: Execute unauthorized code or commands in Fortinet FortiOS
An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability [CWE-113] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4 all versions, FortiProxy 7.2 all versions may allow an attacker in possession of a valid web filter override token to inject arbitrary headers via tricking a user into clicking on a crafted link.
AI Analysis
Technical Summary
This vulnerability (CVE-2025-62675) involves improper neutralization of CRLF sequences in HTTP headers (HTTP response splitting) in Fortinet FortiOS and FortiProxy products. It affects FortiOS versions 7.6.0 through 7.6.4, all 7.4 and 7.2 versions, and FortiProxy versions 7.6.0 through 7.6.4, all 7.4 and 7.2 versions. An attacker who possesses a valid web filter override token can exploit this by tricking a user into clicking a specially crafted link, enabling injection of arbitrary HTTP headers. The vulnerability is confirmed with a CVSS 3.1 base score of 3.4 (low severity). The vendor has released an official fix to address this issue.
Potential Impact
The vulnerability allows an attacker with a valid web filter override token to inject arbitrary HTTP headers via HTTP response splitting. This can lead to limited impact such as manipulation of HTTP responses, but does not directly result in confidentiality or availability loss. The CVSS vector indicates no confidentiality impact, low integrity impact, and no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Fortinet for this vulnerability. Users should apply the vendor-provided patches to affected FortiOS and FortiProxy versions to remediate the issue. Since the vulnerability requires possession of a valid web filter override token and user interaction, patching is the primary recommended mitigation.
CVE-2025-62675: Execute unauthorized code or commands in Fortinet FortiOS
Description
An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability [CWE-113] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4 all versions, FortiProxy 7.2 all versions may allow an attacker in possession of a valid web filter override token to inject arbitrary headers via tricking a user into clicking on a crafted link.
CVSS v3.1
Score 3.4low
Affected software
cpe:2.3:a:fortinet:fortiproxy:7.6.4:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.6.3:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.6.2:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.6.1:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.6.0:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:7.4.14:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-62675) involves improper neutralization of CRLF sequences in HTTP headers (HTTP response splitting) in Fortinet FortiOS and FortiProxy products. It affects FortiOS versions 7.6.0 through 7.6.4, all 7.4 and 7.2 versions, and FortiProxy versions 7.6.0 through 7.6.4, all 7.4 and 7.2 versions. An attacker who possesses a valid web filter override token can exploit this by tricking a user into clicking a specially crafted link, enabling injection of arbitrary HTTP headers. The vulnerability is confirmed with a CVSS 3.1 base score of 3.4 (low severity). The vendor has released an official fix to address this issue.
Potential Impact
The vulnerability allows an attacker with a valid web filter override token to inject arbitrary HTTP headers via HTTP response splitting. This can lead to limited impact such as manipulation of HTTP responses, but does not directly result in confidentiality or availability loss. The CVSS vector indicates no confidentiality impact, low integrity impact, and no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Fortinet for this vulnerability. Users should apply the vendor-provided patches to affected FortiOS and FortiProxy versions to remediate the issue. Since the vulnerability requires possession of a valid web filter override token and user interaction, patching is the primary recommended mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- fortinet
- Date Reserved
- 2025-10-20T08:07:37.650Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
Threat ID: 6a565a3968715ace43c7b5a5
Added to database: 07/14/2026, 15:48:09 UTC
Last enriched: 08/11/2026, 13:14:11 UTC
Last updated: 08/27/2026, 22:52:07 UTC
Views: 98
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.