CVE-2021-40142
No exploitation reported by the sources we read.
- Published2021-08-27
- WeaknessCWE-119
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS) by sending carefully crafted messages that lead to Access of a Memory Location After the End of a Buffer.
Timeline
dates in UTC- 2021-08-2707:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-40142?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-40142?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 14.x | = 14 | no fix published | NVD |
| 15.x | = 15 | no fix published | NVD |
| 16.x | = 16 | no fix published | NVD |
| 17.x | = 17 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2022.x | < 2022 | 2022 | NVD |
| 2022.x | = 2022 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.4 | < 1.04.402.463 | 1.04.402.463 | NVD |
4 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Siemens Industrial Products
OpenPCS 7 V9.1 · SIMATIC NET PC Software V14 · SIMATIC NET PC Software V15 · +7 more
Fix
- Vendor fix CISA ICSA-22-132-12 · 1 productUpdate to V14 SP1 Update 14 or later version
- Vendor fix CISA ICSA-22-132-12 · 1 productUpdate to V18 or later version
- Vendor fix CISA ICSA-22-132-12 · 1 productUpdate to V18 Update 1 or later version
- Vendor fix CISA ICSA-22-132-12 · 1 productUpdate to V3.1.1 or later version
- Vendor fix CISA ICSA-22-132-12 · 1 productUpdate to V8.0 or later version
- Vendor fix CISA ICSA-22-132-12 · 1 productUpdate to V16 Update 6 or later version
Advisories and patches
- cert-portal.siemens.comPatch
- files.opcfoundation.orgPatch · Vendor Advisory
- opcfoundation.orgVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CNACVSS 3.17.5read 2026-10-23
- NVDCVSS 3.17.5read 2026-10-23
- NVDCVSS 2.05read 2026-10-23
- NVDweakness (CWE)CWE-119read 2026-10-23
- FIRST EPSSEPSS score2.6 %2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2021-08-27
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-40142?
Is CVE-2021-40142 actively exploited?
What is the CVSS score for CVE-2021-40142?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.