CVE-2021-26112: fortinet fortinet fortiwan Out-of-bounds Write
CVSS: 9.8v3.1CriticalModified
Published 06-04-2022Last modified 25-10-2024
Vulnerability summary
CVE-2021-26112 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in fortinet fortinet fortiwan. EPSS estimates a 1.75% chance of exploitation in the next 30 days, higher than 77.4% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
1.75%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 06-04-2022PublishedVulnerability first disclosed.
- 25-10-2024Last modifiedVulnerability information updated.
Description
Multiple stack-based buffer overflow vulnerabilities [CWE-121] both in network daemons and in the command line interpreter of FortiWAN before 4.5.9 may allow an unauthenticated attacker to potentially corrupt control data in memory and execute arbitrary code via specifically crafted requests.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources2 sources · 8.1–9.8
- CVE.orgCNA8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:CDiffers
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.75%
Chance of exploitation in the next 30 days
Percentile
77%
Versus all other CVEs
30-day change
0.00 pp
From 1.75% on 19-09-2026
19-09-202619-10-2026
EPSS score1.75%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Fortinet2 products
- fortinet fortiwanFortiWAN before 4.5.9
- fortiwan≤ 4.5.8
1 vendor · 2 products