CVE-2021-26102: fortinet fortiwan
CVSS: 9.8v3.1CriticalAnalyzed
Published 19-12-2024Last modified 19-12-2024
Vulnerability summary
CVE-2021-26102 is a critical (CVSS 9.8) vulnerability in fortinet fortiwan. EPSS estimates a 19.73% chance of exploitation in the next 30 days, higher than 97.3% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
19.73%
0%100%
Medium · +2.97 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 19-12-2024PublishedVulnerability first disclosed.
- 19-12-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:U/RC:CSources2 sources · 9.1–9.8
- NVDNIST9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HDiffers
EPSS trend
Probability
19.73%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
+2.97 pp
From 16.76% on 19-09-2026
19-09-202619-10-2026
EPSS score19.73%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-305Authentication Bypass by Primary WeaknessThe authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.
- CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
Affected systems
Fortinet1 product
- fortiwan≥ 4.5.0, ≤ 4.5.7 | ≥ 4.4.0, ≤ 4.4.1 | ≥ 4.4.0, < 4.5.8
1 vendor · 1 product
References
1 links- fortiguard.fortinet.com/psirt/FG-IR-21-048Vendor Advisory