ctrlINT What the industry said about every indicator, with the quote

CVE-2025-40551Vulnerability

SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

Exploited in the wildCISA added it to its Known Exploited Vulnerabilities list on .

Reported by 3 independent sources · first reported by Huntress · last reported

Last reported 27 days ago

CISA KEVAdded 3 Feb 2026
Fix due 6 Feb 2026
Used by ransomware: not knownCISA KEV catalogue
EPSS84.2%
higher than 99% of CVEsFIRST EPSS, as of 22 Oct 2026

What the reports say

3 reports, newest first · the exact sentence from each

  1. “…ively exploited zero-days, and unknown threat actors actively exploited SolarWinds Web Help Desk vulnerabilities (CVE-2025-26399 and CVE-2025-40551).”

    CERT-EUGovernment
    Cyber Brief 26-03 - February 2026

  2. “…hile not yet confirmed, the activity may be associated with one of the following disclosed CVEs: CVE-2025-26399, CVE-2025-40536, and CVE-2025-40551”

    Elastic Security LabsVendor
    SolarWinds Web Help Desk Exploitation - February 2026

  3. “The most critical vulnerabilities grant an adversary arbitrary code execution via untrusted deserialization -- CVE-2025-40551 was recently added to CISA’s Known Exploited Vulnerabilities database, and CVE-2025-26399 was just recently discussed by Microsoft and other vendors who h…”

    HuntressVendor
    Active Exploitation of SolarWinds Web Help Desk (CVE-2025-26399)

Indicators reported together

named in the same reports
Copy these 12 indicators · defanged

Also named with it: CVE-2025-26399, CVE-2025-40536, CVE-2026-21509, CVE-2026-1281, CVE-2026-1340, CVE-2026-22769

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