CVE-2023-1620

CVE-2023-1620 is a medium-severity vulnerability in Wago 750-331 Firmware with a CVSS 3.x base score of 4.9. 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-1288.

Key facts

• Severity: Medium (CVSS 3.x base score 4.9)
• EPSS exploit prediction: 1% (54th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-1288
• Affected product: Wago 750-331 Firmware
• Published: 2023-06-26
• Last modified: 2026-06-17

Description

Multiple WAGO devices in multiple versions may allow an authenticated remote attacker with high privileges to DoS the device by sending a specifically crafted packet to the CODESYS V2 runtime.

Frequently asked questions

What is CVE-2023-1620?

Multiple WAGO devices in multiple versions may allow an authenticated remote attacker with high privileges to DoS the device by sending a specifically crafted packet to the CODESYS V2 runtime.

How severe is CVE-2023-1620?

CVE-2023-1620 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-1620 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1620?

CVE-2023-1620 primarily affects Wago 750-331 Firmware. In total, 126 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-1620?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-1620 published?

CVE-2023-1620 was published on 2023-06-26 and last updated on 2026-06-17.

References

• https://cert.vde.com/en/advisories/VDE-2023-006/

Affected products (126)

• cpe:2.3:o:wago:750-331_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/000-011_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/000-011_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/000-012_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/000-012_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/000-022_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/000-022_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/025-000_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/025-000_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/025-001_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/025-001_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/025-002_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/025-002_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/040-000_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/040-000_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/040-001_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8202\/040-001_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8203_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8203_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8203\/025-000_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8203\/025-000_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8204_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8204_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8204\/025-000_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8204\/025-000_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206\/025-000_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206\/025-000_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206\/025-001_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206\/025-001_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206\/040-000_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206\/040-000_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206\/040-001_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8206\/040-001_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8207_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8207_firmware:fw22:-:*:*:*:*:*:*
• cpe:2.3:o:wago:750-8207\/025-000_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Wago 750-331 Firmware

• CVE-2020-12516 — High (CVSS 7.5): Older firmware versions (FW1 up to FW10) of the WAGO PLC family 750-88x and 750-352 are vulnerable for a special denial…
• CVE-2023-1619 — Medium (CVSS 4.9): Multiple WAGO devices in multiple versions may allow an authenticated remote attacker with high privileges to DoS the…

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