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CVE-2019-10929

21
FAUCET Score

CVE-2019-10929 is a message protection bypass vulnerability affecting numerous Siemens SIMATIC products, including various CPUs, HMIs, and WinCC versions. An attacker in a Man-in-the-Middle position can exploit this flaw to modify network traffic on port 102/tcp due to weaknesses in the integrity protection calculation. Rated Medium severity (CVSS 5.9), this vulnerability has a network attack vector and high integrity impact, but requires high attack complexity. There is no evidence of active exploitation, public exploit code, or Metasploit modules, though it has received some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc_firmware:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc2_firmware:*:*:*:*:*:*:*:*
<= 4.0CPE matchmatch criteria
cpe:2.3:o:siemens:simatic_s7-1200_cpu_1211c_firmware:*:*:*:*:*:*:*:*
<= 4.0CPE matchmatch criteria
cpe:2.3:o:siemens:simatic_s7-1200_cpu_1212c_firmware:*:*:*:*:*:*:*:*
<= 4.0CPE matchmatch criteria
cpe:2.3:o:siemens:simatic_s7-1200_cpu_1214c_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0098 is in the 17th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cert-portal.siemens.com / productcert/pdf/ssa-232418.pdf
Vendor Advisory
cert-portal.siemens.com / productcert/pdf/ssa-273799.pdf
Vendor Advisory
us-cert.gov / ics/advisories/icsa-19-344-04
Third Party AdvisoryUS Government Resource