Cyber Resilience

CVE-2021-26102

Critical

Published: 19 December 2024

Published
19 December 2024
Modified
21 January 2025
KEV Added
Patch
CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.6081 98.3th percentile
Risk Priority 56 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-26102 is a critical-severity Authentication Bypass by Primary Weakness (CWE-305) vulnerability in Fortinet Fortiwan. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 1.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A relative path traversal vulnerability (CWE-23) in FortiWAN version 4.5.7 and below, 4.4 all versions may allow a remote non-authenticated attacker to delete files on the system by sending a crafted POST request. In particular, deleting specific configuration files will…

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reset the Admin password to its default value.

CWE(s)

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

fortinet
fortiwan
4.4.0 — 4.5.8

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-22

Validates pathnames and filenames to prevent traversal outside intended directories.

References