How severe is CVE-2022-28328?

CVE-2022-28328 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-28328 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-28328?

CVE-2022-28328 primarily affects Siemens Scalance W1788-2ia M12 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-28328?

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-2022-28328 published?

CVE-2022-28328 was published on 2022-04-12 and last updated on 2026-06-17.

CVE-2022-28328

CVE-2022-28328 is a high-severity vulnerability in Siemens Scalance W1788-2ia M12 Firmware with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Siemens Scalance W1788-2ia M12 Firmware
Published: 2022-04-12
Last modified: 2026-06-17

Description

A vulnerability has been identified in SCALANCE W1788-1 M12 (All versions < V3.0.0), SCALANCE W1788-2 EEC M12 (All versions < V3.0.0), SCALANCE W1788-2 M12 (All versions < V3.0.0), SCALANCE W1788-2IA M12 (All versions < V3.0.0). Affected devices do not properly handle malformed Multicast LLC frames. This could allow an attacker to trigger a denial of service condition.

Frequently asked questions

What is CVE-2022-28328?: A vulnerability has been identified in SCALANCE W1788-1 M12 (All versions < V3.0.0), SCALANCE W1788-2 EEC M12 (All versions < V3.0.0), SCALANCE W1788-2 M12 (All versions < V3.0.0), SCALANCE W1788-2IA M12 (All versions < V3.0.0). Affected devices do not properly handle malformed Multicast LLC frames. This could allow an attacker to trigger a denial of service condition.
How severe is CVE-2022-28328?: CVE-2022-28328 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-28328 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-28328?: CVE-2022-28328 primarily affects Siemens Scalance W1788-2ia M12 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-28328?: 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-2022-28328 published?: CVE-2022-28328 was published on 2022-04-12 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-392912.pdf

Affected products (4)

cpe:2.3:o:siemens:scalance_w1788-2ia_m12_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_w1788-2_m12_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_w1788-2_eec_m12_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_w1788-1_m12_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens Scalance W1788-2ia M12 Firmware

CVE-2022-46140 — Medium (CVSS 6.5): Affected devices use a weak encryption scheme to encrypt the debug zip file. This could allow an authenticated attacker…
CVE-2022-28329 — Medium (CVSS 6.5): A vulnerability has been identified in SCALANCE W1788-1 M12 (All versions < V3.0.0), SCALANCE W1788-2 EEC M12 (All…
CVE-2022-46142 — Medium (CVSS 5.7): Affected devices store the CLI user passwords encrypted in flash memory. Attackers with physical access to the device…
CVE-2022-27481 — Medium (CVSS 5.3): A vulnerability has been identified in SCALANCE W1788-1 M12 (All versions < V3.0.0), SCALANCE W1788-2 EEC M12 (All…
CVE-2022-46143 — Low (CVSS 2.7): Affected devices do not check the TFTP blocksize correctly. This could allow an authenticated attacker to read from an…

All CVEs affecting Siemens Scalance W1788-2ia M12 Firmware →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →