CVE-2021-33002 json
Opening a maliciously crafted project file may cause an out-of-bounds write, which may allow an attacker to execute arbitrary code.
published 2021-06-24 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19723
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 62%
- public exploits
- 0
- none known
Summary
Opening a maliciously crafted project file may cause an out-of-bounds write, which may allow an attacker to execute arbitrary code. User interaction is require on the WebAccess HMI Designer (versions 2.1.9.95 and prior).
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-21-173-01 updated cvss 7.8
Advantech WebAccess HMI Designer (Update A)
-
Advantech WebAccess HMI Designer < 2.1.11.0affected: vendor fix, mitigation “Specific questions should be directed to Advantech customer service.” advantech.com
From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf
Exploit prediction
0.97% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- n/a WebAccess HMI Designer
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
us-cert.cisa.gov
/ics/advisories/icsa-21-173-01
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2021-33002
- NVD CVE-2021-33002
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