Cyber Resilience

CVE-2021-34569

Critical

Published: 09 November 2022

Published
09 November 2022
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0029 52.9th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-34569 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Wago 750-8100 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 47.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

In WAGO I/O-Check Service in multiple products an attacker can send a specially crafted packet containing OS commands to crash the diagnostic tool and write memory.

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

wago
750-8100 firmware
18 · ≤ 18
wago
750-8101 firmware
18 · ≤ 18
wago
750-8101\/025-000 firmware
18 · ≤ 18
wago
750-8102 firmware
18 · ≤ 18
wago
750-8102\/025-000 firmware
18 · ≤ 18
wago
750-8202 firmware
18 · ≤ 18
wago
750-8202\/000-011 firmware
18 · ≤ 18
wago
750-8202\/000-012 firmware
18 · ≤ 18
wago
750-8202\/000-022 firmware
18 · ≤ 18
wago
750-8202\/025-000 firmware
18 · ≤ 18
+39 more product configuration(s) — see NVD for full list

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References