CVE-2021-34596
Medium
Published: 26 October 2021
Published
26 October 2021
Modified
15 August 2025
KEV Added
—
Patch
—
CVSS Score v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.0024
46.8th percentile
Risk Priority
13
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-34596 is a medium-severity Access of Uninitialized Pointer (CWE-824) vulnerability in Wago 750-823 Firmware. Its CVSS base score is 6.5 (Medium).
Operationally, ranked at the 46.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-21246
Vulnerability details
A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
wago
750-823 firmware
≤ fw10
wago
750-829 firmware
≤ fw17
wago
750-831 firmware
≤ fw17
wago
750-832 firmware
≤ fw10
wago
750-852 firmware
≤ fw17
wago
750-862 firmware
≤ fw10
wago
750-880 firmware
≤ fw17
wago
750-881 firmware
≤ fw17
wago
750-882 firmware
≤ fw17
wago
750-885 firmware
≤ fw17
+20 more product configuration(s) — see NVD for full list
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.