Page generated: 08 Nov 2026, 12:20 UTC
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CVE-2025-40551

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.

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.9/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 84.18%: +0.42

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 20 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

CSO Online
Press · 10 Feb 2026, 08:00 · SolarWinds WHD zero-days from January are under attack - CSO Online
Cybersecurity Dive
Press · 09 Feb 2026, 08:00 · Threat actors target SolarWinds Web Help Desk flaw - Cybersecurity Dive
The Hacker News
Press · 09 Feb 2026, 08:00 · SolarWinds Web Help Desk Exploited for RCE in Multi-Stage Attacks on Exposed Servers - The Hacker News
SecurityWeek
Press · 09 Feb 2026, 08:00 · Recent SolarWinds Flaws Potentially Exploited as Zero-Days - SecurityWeek
Huntress
Press · 08 Feb 2026, 08:00 · Active Exploitation of SolarWinds Web Help Desk (CVE-2025-26399) - Huntress
See all 20 source documents
Microsoft
Press · 06 Feb 2026, 08:00 · Analysis of active exploitation of SolarWinds Web Help Desk - Microsoft
Cybersecurity Dive
Press · 05 Feb 2026, 08:00 · Critical flaw in SolarWinds Web Help Desk under exploitation - Cybersecurity Dive
The Register
Press · 04 Feb 2026, 08:00 · Critical SolarWinds Web Help Desk bug under attack - The Register
SecurityWeek
Press · 04 Feb 2026, 08:00 · Fresh SolarWinds Vulnerability Exploited in Attacks - SecurityWeek
The Hacker News
Press · 04 Feb 2026, 08:00 · CISA Adds Actively Exploited SolarWinds Web Help Desk RCE to KEV Catalog - The Hacker News
Bitsight
Press · 03 Feb 2026, 08:00 · Critical Vulnerability Alert: CVE-2025-40551 in SolarWinds Web Help Desk - Bitsight
BleepingComputer
Press · 03 Feb 2026, 08:00 · CISA flags critical SolarWinds RCE flaw as exploited in attacks - BleepingComputer
The Record from Recorded Future News
Press · 03 Feb 2026, 08:00 · CISA orders federal agencies to patch exploited SolarWinds bug by Friday - The Record from Recorded Future News
Rescana
Press · 01 Feb 2026, 08:00 · SolarWinds Web Help Desk Critical Vulnerabilities: Unauthenticated RCE and Authentication Bypass Fixed in Emergency Patch - Rescana
Help Net Security
Press · 29 Jan 2026, 08:00 · SolarWinds fixes critical Web Help Desk RCE vulnerabilities, upgrade ASAP! - Help Net Security
SecurityWeek
Press · 29 Jan 2026, 08:00 · SolarWinds Patches Critical Web Help Desk Vulnerabilities - SecurityWeek
The Hacker News
Press · 29 Jan 2026, 08:00 · SolarWinds Fixes Four Critical Web Help Desk Flaws With Unauthenticated RCE and Auth Bypass - The Hacker News
Arctic Wolf
Press · 28 Jan 2026, 08:00 · Multiple Critical Authentication Bypass and Remote Code Execution Vulnerabilities Fixed in SolarWinds Web Help Desk - Arctic Wolf
BleepingComputer
Press · 28 Jan 2026, 08:00 · SolarWinds warns of critical Web Help Desk RCE, auth bypass flaws - BleepingComputer
Rapid7
Press · 28 Jan 2026, 08:00 · Multiple Critical SolarWinds Web Help Desk Vulnerabilities: CVE-2025-40551, CVE-2025-40552, CVE-2025-40553, CVE-2025-40554 - Rapid7

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.9 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 84.2%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:59:37.110490+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
28 Jan 2026, 07:33
First press mention
28 Jan 2026, 08:00
Added to the CISA KEV catalog
03 Feb 2026, 00:00
Latest press mention
10 Feb 2026, 08:00
Score calculated
05 Nov 2026, 13:59