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Report · SANS ISC Handlers DiaryAbout CVE-2025-34033Published

webctrl.cgi/Blue Angel Software Suite Exploit Attempts. Maybe CVE-2025-34033 Variant?, (Wed, Oct 22nd)

Source SANS ISC Handlers Diary

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Authoritative record:CVE-2025-34033· High 7.7

Not known to be exploited · public detection template (Nuclei) · CVSS 7.7 High.

Data as of 29 Oct 2026, 10:36 UTC

CVSS 4.0 base score
7.7High
How severe the flaw is on the 0–10 CVSS scale.
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Jun 2025

  2. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

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

    Not in CISA KEV and no source reports exploitation

  4. 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 29 Oct 2026.

What to do

AI-suggested

  1. Immediately audit and inventory all devices running the Blue Angel Software Suite or similar embedded Linux devices with webctrl.cgi endpoints.
  2. Change all default and backdoor credentials on affected devices to strong, unique passwords.
  3. Disable or restrict access to the /cgi-bin/webctrl.cgi CGI script if not required for normal operations.
  4. Implement strict input validation and sanitization on all parameters passed to system commands, especially ipaddress and ping-related parameters.
  5. Apply network segmentation to isolate vulnerable devices from critical internal networks and limit exposure.
  6. Monitor network traffic and web server logs for suspicious POST requests to /cgi-bin/webctrl.cgi, particularly those containing shell metacharacters or unusual parameters.
  7. Deploy intrusion detection/prevention systems with signatures to detect exploitation attempts targeting this vulnerability.
  8. Engage with device vendors for patches or firmware updates addressing this vulnerability and apply them promptly once available.
  9. Conduct regular penetration testing and vulnerability assessments focusing on embedded devices and IoT infrastructure.
  10. Educate network and security teams about this specific threat to improve detection and response capabilities.

Description

Starting yesterday, some of our honeypots received POST requests to "/cgi-bin/webctrl.cgi", attempting to exploit an OS command injection vulnerability:

References

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