How severe is CVE-2021-31338?

CVE-2021-31338 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-31338 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31338?

CVE-2021-31338 primarily affects Siemens Sinema Remote Connect. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-31338?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-31338 published?

CVE-2021-31338 was published on 2021-08-19 and last updated on 2026-06-17.

CVE-2021-31338

CVE-2021-31338 is a high-severity vulnerability in Siemens Sinema Remote Connect with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-15.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-15
Affected product: Siemens Sinema Remote Connect
Published: 2021-08-19
Last modified: 2026-06-17

Description

A vulnerability has been identified in SINEMA Remote Connect Client (All versions < V3.0 SP1). Affected devices allow to modify configuration settings over an unauthenticated channel. This could allow a local attacker to escalate privileges and execute own code on the device.

Frequently asked questions

What is CVE-2021-31338?: A vulnerability has been identified in SINEMA Remote Connect Client (All versions < V3.0 SP1). Affected devices allow to modify configuration settings over an unauthenticated channel. This could allow a local attacker to escalate privileges and execute own code on the device.
How severe is CVE-2021-31338?: CVE-2021-31338 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-31338 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31338?: CVE-2021-31338 primarily affects Siemens Sinema Remote Connect. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-31338?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-31338 published?: CVE-2021-31338 was published on 2021-08-19 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-816035.pdf

Affected products (2)

cpe:2.3:a:siemens:sinema_remote_connect:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinema_remote_connect:3.0:-:*:*:*:*:*:*

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