CVE-2021-26567: faad2_project faad2 Stack-based Buffer Overflow
CVSS: 7.8v3.1HighModified
Published 26-02-2021Last modified 16-09-2024
Vulnerability summary
CVE-2021-26567 is a high (CVSS 7.8) Stack-based Buffer Overflow vulnerability in faad2_project faad2. EPSS estimates a 1.13% chance of exploitation in the next 30 days, higher than 65.8% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
1.13%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 26-02-2021PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
Description
Stack-based buffer overflow vulnerability in frontend/main.c in faad2 before 2.2.7.1 allow local attackers to execute arbitrary code via filename and pathname options.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
Medium 6.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.13%
Chance of exploitation in the next 30 days
Percentile
66%
Versus all other CVEs
30-day change
0.00 pp
From 1.13% on 18-09-2026
18-09-202618-10-2026
EPSS score1.13%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Synology4 products
- diskstation_manager< 6.2.3-25426-3
- diskstation_manager_unified_controller3.0
- skynasna
- vs960hd_firmwarena
Faad2_project1 product
- faad2< 2.2.7.1
Github/knik01 product
- faad2≥ unspecified, < 2.2.7.1
3 vendors · 6 products