Vulnerability · Published Sep 14, 2021 · Assigned by siemens
CVE-2021-33720
High 7.5
In plain English
A high-severity buffer overflow in SIPROTEC 5 relays with CPU variants CP050 from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities).
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.0%top 35.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A vulnerability has been identified in SIPROTEC 5 relays with CPU variants CP050 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP100 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP300 (All versions < V8.80). Specially crafted packets sent to port 4443/tcp could cause a Denial-of-Service condition.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SIPROTEC 5 relays with CPU variants CP050 | All versions < V8.80 |
| Siemens | SIPROTEC 5 relays with CPU variants CP100 | All versions < V8.80 |
| Siemens | SIPROTEC 5 relays with CPU variants CP300 | All versions < V8.80 |
Weakness: CWE-120
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-847986.pdf x_refsource_MISC