CVE-2021-23157: we-con levistudiou Heap-based Buffer Overflow
CVSS: 7.8v3.1HighModified
Published 14-01-2022Last modified 16-04-2025
Vulnerability summary
CVE-2021-23157 is a high (CVSS 7.8) Heap-based Buffer Overflow vulnerability in we-con levistudiou. EPSS estimates a 7.61% chance of exploitation in the next 30 days, higher than 94.5% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
7.61%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 14-01-2022PublishedVulnerability first disclosed.
- 16-04-2025Last modifiedVulnerability information updated.
Description
WECON LeviStudioU Versions 2019-09-21 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
7.61%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
0.00 pp
From 7.61% on 21-09-2026
21-09-202621-10-2026
EPSS score7.61%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
We-con1 product
- levistudiou≤ 2019-09-21
Wecon1 product
- levistudiou≥ All, ≤ 2019-09-21
2 vendors · 2 products
References
3 links
www.cisa.gov/uscert/ics/advisories/icsa-21-355-03X Refsource MISCThird Party AdvisoryUS Government Resource