Improper authentication in Fortinet FortiWeb
CVSS score
8.8
EPSS probability
%0.8
Risk score
0.1
Published
2 mo ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%53
Short explanation
CVE-2026-26035 is a high-severity improper authentication vulnerability in FortiWeb versions up to 8.0.2 and 7.0.12. It enables remote unauthenticated access with random credentials. Patch status is UNKNOWN. No public exploit or active exploitation is confirmed.
This vulnerability allows attackers to gain full access to FortiWeb interfaces without authentication, posing a significant risk to network security. Without a confirmed patch, organizations remain exposed until a verified update is applied.
What should be done?
- Ensure FortiWeb version is updated to 8.0.3 or later, or 7.6.7 or later, or 7.4.12 or later, or 7.2.13 or later, or 7.0.13 or later.
- Follow official Fortinet advisory at https://fortiguard.fortinet.com/psirt/FG-IR-26-158 for version-specific guidance.
- No public exploit or active exploitation is confirmed; however, the vulnerability remains exploitable.
The sources give limited detail on some technical conditions. Review the chain of evidence below before deciding how to act.
Chain of evidence and sources
Fortinet FortiWeb 8.0.0 ile 8.0.2, 7.6.0 ile 7.6.6, 7.4.0 ile 7.4.11, 7.2.0 ile 7.2.12 ve 7.0.0 ile 7.0.12 arasında bulunan bir yanlış kimlik doğrulama açıklığı, uzak ve kimlik doğrulama olmadan bir atakçının rastgele bir kullanıcı adı ve şifre ile giriş yapmasına izin verir.
Açıklık, CVSS 3.1 puanı 8.8 ile yüksek önem taşır ve gizlilik, bütünlük ve kullanılabilirlik alanlarında tam etki yaratır.
Yama değerlendirmesi bilinmiyor; resmî kaynaklardan bir düzeltme hakkında güvenilir bilgi yoktur.
Show the technical text from the sources
An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12 may allow a remote unauthenticated attacker to login into the Fortiweb GUI/CLI with a random username and password
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CWE: CWE-287
Explanation produced with the local qwen3:4b-instruct model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 9.8 | CVSS V31 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD |
| 8.8 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-26035 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-26035 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
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curl -H "x-api-key: $DAYBREACH_API_KEY" \ "https://api.enginteksut.com.tr/api/v1/intel/cves/CVE-2026-26035"