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SolarWinds · Parser conflict

SolarWinds Web Help Desk Unsafe Deserialisation Vulnerability

CVE-2025-40551

What this means

This is rated critical severity (9.8 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether Solarwinds Web Help Desk is in your estate, and treat that as the priority.

Full vendor description

SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.

Scoring and exploitation

9.8/ 10
CVSS 3.1 base scoreCritical

Exploitable over the network without any account, and no one has to click or open anything. High impact on confidentiality, integrity and availability.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability

Longer bar: easier to attack

Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredNonePR:N
User interactionNoneUI:N
ScopeUnchangedS:U

Impact

Longer bar: more harm

ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
Elevated attack likelihood (~84.2% in 30 days)Model estimate (): a probability signal, not confirmed exploitation
Exploited in the wild
Yes — confirmed exploitation (US CISA )
Not reported
Listed product
SolarWinds Web Help Desk

Weaknesses

CWE-502

Affected products ()

  • Solarwinds Web Help Desk
Show the raw CPE strings (1)
  • cpe:2.3:a:solarwinds:web_help_desk:*:*:*:*:*:*:*:*

References

3 links from the CVE record, grouped by site; the vendor's advisory comes first.

Related feed events

  • SolarWinds Web Help Desk Unsafe Deserialisation Vulnerability

    Type Vulnerability

    SolarWinds Web Help Desk contains a deserialisation of untrusted data vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine.

    Next step: Confirm whether SolarWinds is in your estate.

    Who's reporting

    1 of 3 perspectives

    Official authority: Official 1Vendor statement missing. no VendorResearcher coverage missing. no Researcher1 signal

    Only official coverage so far. Treat as an early signal.

    SolarWinds
    CVE-2025-40551