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VulnerabilityPublished Updated

CVE-2025-3495: Delta Electronics COMMGR · PRNG

Affects Delta Electronics COMMGRSource CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 53% 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:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Apr 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Delta Electronics COMMGRAffected
  • =0
Fixed in–

AI-suggested

  1. Immediate network segmentation: Isolate devices running COMMGR from general IT networks and limit access to trusted management stations only.
  2. Implement strict firewall rules to restrict inbound traffic to COMMGR services, allowing only known and authorized IP addresses.
  3. Monitor network traffic for unusual session ID patterns or brute force attempts targeting COMMGR session management.
  4. Employ intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics tuned to detect exploitation attempts related to weak session ID generation.
  5. Engage with Delta Electronics for updates or patches; if none are available, consider temporary compensating controls such as disabling remote access or replacing the vulnerable software with alternatives.
  6. Conduct regular audits of devices running COMMGR to identify unauthorized code execution or anomalous behavior.
  7. Educate operational technology (OT) and security teams about this vulnerability and ensure incident response plans include scenarios involving COMMGR compromise.

Description

Delta Electronics COMMGR v1 and v2 uses insufficiently randomized values to generate session IDs (CWE-338). An attacker could easily brute force a session ID and load and execute arbitrary code.

References

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