CVE-2024-22040: Siemens Cerberus PRO EN Engineering Tool · Out-of-bounds Read
Affects Siemens Cerberus PRO EN Engineering ToolSource CVE Database V5
Public exploit available · CVSS 7.5 High.
Data as of 26 Oct 2026, 12:29 UTC
- EPSS
- 0.8% chance of exploitation in 30 days – higher than 57% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:CExploitation evidence
Disclosed: evidence found.
CVE published 12 Mar 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Siemens Cerberus PRO EN Engineering Tool | Affected
| Fixed in– |
AI-suggested
- Apply vendor patches and updates as soon as they become available for all affected Siemens Cerberus PRO EN and Sinteso FS20 EN products. Monitor Siemens security advisories closely.
- Implement network segmentation and isolate fire safety systems from general IT networks and the internet to reduce exposure to remote attacks.
- Deploy firewall rules to restrict inbound traffic to only trusted management stations and authorized devices communicating with the fire panels.
- Monitor network traffic for anomalous or malformed packets targeting the HMAC validation process, which could indicate exploitation attempts.
- Use intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics tuned to detect exploitation patterns related to this vulnerability.
- Conduct regular security audits and penetration testing focused on fire safety and building management systems to identify and remediate weaknesses.
- Develop and test incident response plans that include scenarios involving denial of service on fire safety systems to ensure rapid recovery and safety continuity.
- Engage with Siemens support and cybersecurity teams for guidance and to report any suspicious activity or exploitation attempts.
- Consider deploying redundant fire safety systems or failover mechanisms to maintain availability in case of service disruption.
Description
A vulnerability has been identified in Cerberus PRO EN Engineering Tool (All versions), Cerberus PRO EN Fire Panel FC72x IP6 (All versions), Cerberus PRO EN Fire Panel FC72x IP7 (All versions), Cerberus PRO EN Fire Panel FC72x IP8 (All versions < IP8 SR4), Cerberus PRO EN X200 Cloud Distribution IP7 (All versions), Cerberus PRO EN X200 Cloud Distribution IP8 (All versions < V4.3.5618), Cerberus PRO EN X300 Cloud Distribution IP7 (All versions), Cerberus PRO EN X300 Cloud Distribution IP8 (All versions < V4.3.5617), Cerberus PRO UL Compact Panel FC922/924 (All versions < MP4), Cerberus PRO UL Engineering Tool (All versions < MP4), Cerberus PRO UL X300 Cloud Distribution (All versions < V4.3.0001), Desigo Fire Safety UL Compact Panel FC2025/2050 (All versions < MP4), Desigo Fire Safety UL Engineering Tool (All versions < MP4), Desigo Fire Safety UL X300 Cloud Distribution (All versions < V4.3.0001), Sinteso FS20 EN Engineering Tool (All versions), Sinteso FS20 EN Fire Panel FC20 MP6 (All versions), Sinteso FS20 EN Fire Panel FC20 MP7 (All versions), Sinteso FS20 EN Fire Panel FC20 MP8 (All versions < MP8 SR4), Sinteso FS20 EN X200 Cloud Distribution MP7 (All versions), Sinteso FS20 EN X200 Cloud Distribution MP8 (All versions < V4.3.5618), Sinteso FS20 EN X300 Cloud Distribution MP7 (All versions), Sinteso FS20 EN X300 Cloud Distribution MP8 (All versions < V4.3.5617), Sinteso Mobile (All versions). The network communication library in affected systems insufficiently validates HMAC values which might result in a buffer overread. This could allow an unauthenticated remote attacker to crash the network service.