CVE-2021-34259: st stm32cube_middleware Classic Buffer Overflow
CVSS: 6.8v3.1MediumModified
Published 22-07-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-34259 is a medium (CVSS 6.8) Classic Buffer Overflow vulnerability in st stm32cube_middleware. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 39.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.8/10
010
Medium · v3.1 (NVD)EPSS score
0.48%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 22-07-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A buffer overflow vulnerability in the USBH_ParseCfgDesc() function of STMicroelectronics STM32Cube Middleware v1.8.0 and below allows attackers to execute arbitrary code.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 6.8Preferred score · NVD (NIST)
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
Medium 4.6Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
0.48%
Chance of exploitation in the next 30 days
Percentile
40%
Versus all other CVEs
30-day change
0.00 pp
From 0.47% on 19-09-2026
19-09-202619-10-2026
EPSS score0.48%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundStm32Cubeh7
Maturity: poc
Weaknesses
CWE · root causeAffected systems
St1 product
- stm32cube_middleware≤ 1.8.0
1 vendor · 1 product