PatchTheCVECVE-2025-40553: SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that c
CVE-2025-40553 is a critical-severity flaw (CVSS 9.8) affecting web help desk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- EPSS top 1%: very likely to be exploited
- CISA SSVC: public proof of concept
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 68.0% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-502 |
| Published | 2026-01-28 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-40553?
web help desk: upgrade to 2026.1. Exact commands for each OS are on this page.
Is CVE-2025-40553 being exploited?
CVE-2025-40553 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-40553 affect?
CVE-2025-40553 affects web help desk. Severity is critical (CVSS 9.8). 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 wit
How urgent is CVE-2025-40553?
Priority 70/100. Critical severity; EPSS top 1%: very likely to be exploited; CISA SSVC: public proof of concept; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action
Related CVEs
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- CVE-2025-26399 CRITICAL 9.8 EXPLOITED UPGRADE SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
- CVE-2026-28299 HIGH 8.2 UPGRADE SolarWinds Web Help Desk is found to be affected by a denial-of-service vulnerability, which when exploited, c
- CVE-2025-40554 CRITICAL 9.8 UPGRADE SolarWinds Web Help Desk was found to be susceptible to an authentication bypass vulnerability that, if exploi
- CVE-2025-40552 CRITICAL 9.8 UPGRADE SolarWinds Web Help Desk was found to be susceptible to an authentication bypass vulnerability that if exploit