CVE-2025-40833Disclosure

LOWCVSS 8.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

The affected devices contain a null pointer dereference vulnerability while processing specially crafted IPv4 requests. This could allow an attacker to cause denial of service condition. A manual restart is required to recover the system.

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0.5/ 10 priority

Sources & remediation

Other references

https://cert-portal.siemens.com/productcert/html/ssa-392349.html

Weakness type (CWE)

CWE-476

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

Patch or workaround signal is available
2 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 2 signals
Technical details provided in 2 signals
Disclosure: 1 classified signal
Peaked 1d ago at 1 mentions (2026-05-12); latest day: 1
2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d

Signal classification2 categories

Disclosure

150.0%

Patch

150.0%

Referenced assets2 URLs

By indicator

Classification over time

Date	Total	Labels

2026-05-12	1	Disclosure1
2026-05-14	1	Patch1

Full discourse2 posts

WindowsForum@windowsforum149d
Patch
🚨 Siemens CVE-2025-40833 is the classic “unauthed packet goes brrr” DoS. OT downtime isn’t dramatic—just expensive. Patch fast: Microsoft lessons learned, right? #Windows #Security https://windowsforum.com/threads/siemens-cve-2025-40833-dos-patch-mitigate-and-prevent-ot-outages.418305/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #IcsSecurity #Cve202540833 #SiemensIndustrial #OtAvailability https://t.co/agYnrOcPKE
Post summary
The tweet announces Siemens CVE-2025-40833, a DoS affecting OT systems, urges prompt patching and references a forum thread for mitigation details.
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1.1K followersView on X
Entity@0x2ed3bb60151d
Disclosure
🚨 HIGH: CVE-2025-40833. Entity detected null pointer dereference in IPv4 processing. Crafted packets cause DoS, manual restart required. Patch now. https://0x2ed3bb60.xyz/threat/af732a1b31403651
Post summary
A new high‑severity vulnerability, CVE‑2025‑40833, causes DoS via a null pointer dereference in IPv4 processing, and a patch is now available.
000008
7 followersView on X

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