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.
CVE-2025-62826
MEDIUMNVD 4.33.1Trending — 4 sources updated this week
EchelonGraph scoreLOW confidence
This low-severity CVE scores 3.1 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: cna:fortinet
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.3
- EG Score
- 3.1(low)
- EPSS
- 17.2%
- KEV
- Not listed
Published
July 14, 2026
Last Modified
July 14, 2026
References (1)
- psirt@fortinethttps://fortiguard.fortinet.com/psirt/FG-IR-26-153
Vendor Advisories for CVE-2025-62826(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 5× in last 7d / 5× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-14 19:21 UTCNVD updateCVSS v3 → 4.3 · severity → MEDIUM
- 2026-07-14 15:42 UTCEG score recompute
- 2026-07-14 15:40 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2025-62826?
CVE-2025-62826 is a medium vulnerability published on July 14, 2026. 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…
When was CVE-2025-62826 disclosed?
CVE-2025-62826 was first published in the National Vulnerability Database on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-62826 actively exploited?
CVE-2025-62826 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-62826?
CVE-2025-62826 has a CVSS v3 base score of 4.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 3.1. The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2025-62826?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-62826, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2025-62826
Is Your Infrastructure Affected by CVE-2025-62826?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.