tlp clear · KRVTZ-NET IDS alerts for 2026-05-08
Affects tlp clearSource CIRCL OSINT Feed
TLP:CLEAR, disclosure is not limited
Exploited in the wild · used in ransomware campaigns · KEV due 4 Jul 2023 · public exploit available · 85% EPSS : block it and hunt for it in your logs now.
Data as of 30 Oct 2026, 11:52 UTC
- KEV deadline
- US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
- Ransomware
- Used in ransomware campaigns
- EPSS
- 85.6% chance of exploitation in 30 days – higher than 99% 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/E:F/RL:X/RC:RExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 13 Jun 2023
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: evidence found.
Listed in CISA KEV the same day as disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by Fortinet, Inc.
, 96 days before disclosure
CVE published
on cve.org
, t = 0
Added to CISA KEV (opens in a new tab)
exploitation confirmed · ransomware use known
, the same day as disclosure
KEV remediation due
US federal deadline
, 21 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Apply updates per vendor instructions.
Description
The KRVTZ-NET IDS alerts for May 8, 2026, report network reconnaissance and scanning activities, including exploit attempts targeting Fortigate VPN devices via repeated GET requests to the /remote/logincheck endpoint. These attempts are linked to CVE-2023-27997. The alert does not specify affected product versions or confirm successful exploitation. Known exploits in the wild exist, and the vulnerability is associated with CWE-122. Patch availability is not confirmed in this alert, and the severity is assessed as low.
Indicators of compromise
IP addresses 21
- 4.227.176.58ET INFO Request to Hidden Environment File - Inbound
- 89.249.195.18ET SCAN Exabot Webcrawler User Agent
- 104.239.41.28ET SCAN Exabot Webcrawler User Agent
- 92.113.119.138ET SCAN Exabot Webcrawler User Agent
- 150.109.46.88ET USER_AGENTS User-Agent (_TEST_)
- 2001:470:1:fb5::200ET EXPLOIT Fortigate VPN - Repeated GET Requests to /remote/logincheck (CVE-2023-27997)
- 43.157.175.122ET USER_AGENTS User-Agent (_TEST_)
- 2001:470:1:332::37ET EXPLOIT Fortigate VPN - Repeated GET Requests to /remote/logincheck (CVE-2023-27997)
- 43.157.67.70ET USER_AGENTS User-Agent (_TEST_)
- 119.28.89.249ET USER_AGENTS User-Agent (_TEST_)