Security Resilience

CVE-2023-1620

Wago 750-8202 Firmware ≤ fw22

Published
26 June 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 4.9
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0085 57th percentile
Risk Priority 41 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-1620 is a medium-severity Improper Validation of Consistency within Input (CWE-1288) vulnerability in Wago 750-8202 Firmware. Its CVSS base score is 4.9 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Junk Data (T1001.001); ranked in the top 43% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

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.

CWE(s)
CWE-1288

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001.001 Junk Data Command And Control
Adversaries may add junk data to protocols used for command and control to make detection more difficult.
attack.mitre.org →
T1003.001 LSASS Memory Credential Access
Adversaries may attempt to access credential material stored in the process memory of the Local Security Authority Subsystem Service (LSASS).
attack.mitre.org →
T1003.002 Security Account Manager Credential Access
Adversaries may attempt to extract credential material from the Security Account Manager (SAM) database either through in-memory techniques or through the Windows Registry where the SAM database is stored.
attack.mitre.org →
T1003.006 DCSync Credential Access
Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…
attack.mitre.org →
T1003.008 /etc/passwd and /etc/shadow Credential Access
Adversaries may attempt to dump the contents of <code>/etc/passwd</code> and <code>/etc/shadow</code> to enable offline password cracking.
attack.mitre.org →
T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-1619Same product: Wago 750-331
CVE-2026-69793Shared CWE-1288
CVE-2026-42982Shared CWE-1288
CVE-2023-32701Shared CWE-1288
CVE-2024-12093Shared CWE-1288
CVE-2024-39515Shared CWE-1288
CVE-2026-15943Shared CWE-1288
CVE-2025-2885Shared CWE-1288
CVE-2026-14781Shared CWE-1288
CVE-2026-56744Shared CWE-1288

Affected Assets

wago
750-331 firmware
≤ fw17
wago
750-8202 firmware
fw22 · ≤ fw22
wago
750-8202\/000-011 firmware
fw22 · ≤ fw22
wago
750-8202\/000-012 firmware
fw22 · ≤ fw22
wago
750-8202\/000-022 firmware
fw22 · ≤ fw22
wago
750-8202\/025-000 firmware
fw22 · ≤ fw22
wago
750-8202\/025-001 firmware
fw22 · ≤ fw22
wago
750-8202\/025-002 firmware
fw22 · ≤ fw22
wago
750-8202\/040-000 firmware
fw22 · ≤ fw22
wago
750-8202\/040-001 firmware
fw22 · ≤ fw22
+66 more product configuration(s) — see NVD for full list

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V2.2.2
  • V4.2.3
  • V12.3.2

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 partial match
blocks

Secure SDLC practices directly require consistency validation for complex inputs.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.25 Secure development life cycle partial match
blocks

A.8.25 mandates security requirements, checkpoints, secure coding, testing (incl. code scans) and developer training in the SDLC, which reaches a minority slice of consistency-validation defects when those practices are applied to input handling but leaves most instances (e.g. ad-hoc parsing, non-security requirements, post-SDLC changes) unaddressed.

A.8.26 Application security requirements partial match
blocks

A.8.26 explicitly requires identifying and addressing input validation and consistency-related requirements (items j, m, n, and resilience against injections/disruptions in d), which when implemented stops exploitation of consistency-validation flaws even if the code defect remains.

A.8.27 Secure system architecture and engineering principles partial match
blocks

A.8.27 mandates security-by-design principles including data validation/sanitization, distrust-external-input, secure design reviews against attack patterns, and zero-trust verification of requests; this directly stops most consistency-validation flaws from being introduced or exploitable, with a bounded remainder in implementation gaps or non-applicable outsourced components.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly require validation of interrelated input fields to prevent CWE-1288.

A.8.29 Security testing in development and acceptance partial match
finds

Security testing can detect consistency flaws but does not prevent them at design time.

A.8.8 Management of technical vulnerabilities partial match
removes

References