CVE-2021-20093: siemens pss_cape Out-of-bounds Read
CVSS: 9.1v3.1CriticalModified
Published 16-06-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-20093 is a critical (CVSS 9.1) Out-of-bounds Read vulnerability in siemens pss_cape. EPSS estimates a 33.30% chance of exploitation in the next 30 days, higher than 98.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.1/10
010
Critical · v3.1 (NVD)EPSS score
33.30%
0%100%
High · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 16-06-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.
CVSS metrics
2 scores · 1 source · 2 versionsCritical 9.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HSourcesSingle source
Medium 6.4Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:N/A:PSourcesSingle source
EPSS trend
Probability
33.30%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
0.00 pp
From 33.30% on 18-09-2026
18-09-202618-10-2026
EPSS score33.30%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (tenable.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Siemens8 products
- pss_capena
- simatic_information_server2019:sp1 | 2020
- simatic_pcs_neo< 3.1
- simatic_process_historian≥ 2019, < 2020 | 2020
- simatic_wincc_oa3.17 | 3.18
Wibu1 product
- codemeter≤ 7.21a
2 vendors · 9 products
References
4 links- cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdfX Refsource MISCMitigationVendor Advisory
us-cert.cisa.gov/ics/advisories/icsa-21-210-02X Refsource MISCThird Party AdvisoryUS Government Resource