CVE-2021-24018: fortinet fortinet fortios Out-of-bounds Write
CVSS: 8.8v3.1HighModified
Published 04-08-2021Last modified 25-10-2024
Vulnerability summary
CVE-2021-24018 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in fortinet fortinet fortios. EPSS estimates a 1.03% chance of exploitation in the next 30 days, higher than 63.3% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
1.03%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 04-08-2021PublishedVulnerability first disclosed.
- 25-10-2024Last modifiedVulnerability information updated.
Description
A buffer underwrite vulnerability in the firmware verification routine of FortiOS before 7.0.1 may allow an attacker located in the adjacent network to potentially execute arbitrary code via a specifically crafted firmware image.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources2 sources · 4.3–8.8
- CVE.orgCNA4.3MediumCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:X/RL:U/RC:CDiffers
Medium 5.8Preferred score · NVD (NIST)
AV:A/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.03%
Chance of exploitation in the next 30 days
Percentile
63%
Versus all other CVEs
30-day change
0.00 pp
From 1.03% on 20-09-2026
20-09-202620-10-2026
EPSS score1.03%
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 fortiosFortiOS before 7.0.1
- fortiosEOL< 6.2.10 | ≥ 6.4.0, < 6.4.7 | 7.0.0
1 vendor · 2 products