CVE-2025-62826An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability [CWE-113] vulnerability in Fortinet…
- 3.1LowCVSS base score
- 0.37%Exploitation in 30 daysEPSS · top 68% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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 able to intercept and modify a user's captive portal authentication request to inject arbitrary headers via crafted HTTP requests.
Timeline
ID reserved
By fortinet
- 9 months later
· 9 months later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| fortinetCNA (assigner) | 3.1 | Low3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C |
| NVDNVD · Modified | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.37% · top 68% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.1.
Affected products
- affected 1.7.0
- affected 1.6.0 – ≤ 1.6.2
- affected 1.5.0 – ≤ 1.5.1
- affected 1.4.0 – ≤ 1.4.3
- affected 1.3.0 – ≤ 1.3.1
- affected 1.2.0
- affected 1.1.0 – ≤ 1.1.2
- affected 1.0.0 – ≤ 1.0.3
- affected 7.6.0 – ≤ 7.6.4
- affected 7.4.0 – ≤ 7.4.14
- affected 7.2.0 – ≤ 7.2.16
- affected 7.0.0 – ≤ 7.0.23
- affected 7.6.0 – ≤ 7.6.2
- affected 7.4.0 – ≤ 7.4.8
- affected 7.2.0 – ≤ 7.2.13
- affected 7.0.0 – ≤ 7.0.19
- affected 6.4.0 – ≤ 6.4.16
What to do
Solution: Upgrade to FortiProxy version 7.6.5 or above Upgrade to upcoming FortiOS version 8.0.0 or above Upgrade to FortiOS version 7.6.5 or above Fortinet remediated this issue in FortiSASE version 25.4.b and hence customers do not need to perform any action. Fortinet remediated this issue in FortiSASE version 25.4.a and hence customers do not need to perform any action.
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-210466 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-62826)Record last updated .