THREATPORT/VULNERABILITY/CVE-2021-26102
CRITICAL SEVERITY

CVE-2021-26102

Fortiwan vulnerability

CVSS
9.8
EPSS
16.4%
EPSS pct
97th
Exploited
No known
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 reset the Admin password to its default value.
Affected vendor
Fortinet
Affected product
Fortiwan
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2024-12-19

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 16.4% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2021-26102

  • Confirm whether Fortinet Fortiwan is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-26102.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-26102

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-26102 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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