CVE-2021-45117: opcfoundation ua-nodeset NULL Pointer Dereference
CVSS: 6.5v3.1MediumModified
Published 21-03-2022Last modified 04-08-2024
Vulnerability summary
CVE-2021-45117 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in opcfoundation ua-nodeset. EPSS estimates a 1.42% chance of exploitation in the next 30 days, higher than 72.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.42%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 21-03-2022PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointer dereference.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesSingle source
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.42%
Chance of exploitation in the next 30 days
Percentile
72%
Versus all other CVEs
30-day change
0.00 pp
From 1.42% on 18-09-2026
18-09-202618-10-2026
EPSS score1.42%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (youtube.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Siemens3 products
- simatic_net_pc14 | 15 | 16 | 17
- sitop_managerna
- telecontrol_server_basic3.0
Opcfoundation1 product
- ua-nodeset< 1.05.01
2 vendors · 4 products