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NVD / CVE Program· CNA mitre

CVE-2009-4006: Stack-based buffer overflow in the TEA decoding algorithm in RhinoSoft Serv-U FTP server 7.0.0.1, 9.0.0.5, and other versions before 9.1.0.0

Noroxi assessment

Priority: This week (action score 65/100)

  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 82.9% (FIRST EPSS); higher than 99.6% of all records.
  • No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Stack-based buffer overflow in the TEA decoding algorithm in RhinoSoft Serv-U FTP server 7.0.0.1, 9.0.0.5, and other versions before 9.1.0.0 allows remote attackers to execute arbitrary code via a long hexadecimal string.

CriticalCVSS 10.0 · v2.0—Weaponized No fix recorded
Published
Nov 20, 2009
Updated
Jun 16, 2026
EPSS
82.9% · 99th percentile

Report tools

JSON

Action score

65

This week

Don’t wait for the next maintenance window.

CVSS
40 / 40 · 10.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
25 / 30 · 82.9%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2009-4006

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
solarwindsserv-u file server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • solarwinds serv-u file server7.0.0.1
  • solarwinds serv-u file server7.0.0.2
  • solarwinds serv-u file server7.0.0.3
  • solarwinds serv-u file server7.0.0.4
  • solarwinds serv-u file server7.1.0.0
  • solarwinds serv-u file server7.1.0.1
  • solarwinds serv-u file server7.1.0.2
  • solarwinds serv-u file server7.2.0.0
  • solarwinds serv-u file server7.2.0.1
  • solarwinds serv-u file server7.3.0.0
  • solarwinds serv-u file server7.3.0.1
  • solarwinds serv-u file server7.3.0.2
  • solarwinds serv-u file server7.4.0.0
  • solarwinds serv-u file server7.4.0.1
  • solarwinds serv-u file server8.0.0.1
  • solarwinds serv-u file server8.0.0.2
  • solarwinds serv-u file server8.0.0.4
  • solarwinds serv-u file server8.0.0.5
  • solarwinds serv-u file server8.0.0.7
  • solarwinds serv-u file server8.1.0.1

Same product

solarwinds: all records

Other highest-scoring records for the same primary product.

  • CVE-2004-0330Buffer overflow in Serv-U ftp before 5.0.0.4 allows remote authenticated users to execute arbitrary code via a long time zone argument to th
    66This week
  • CVE-2004-2111Stack-based buffer overflow in the site chmod command in Serv-U FTP Server before 4.2 allows remote attackers to execute arbitrary code via
    60This week
  • CVE-2004-2532Serv-U FTP server before 5.1.0.0 has a default account and password for local administration, which allows local users to execute arbitrary
    45Plan

Published before and after this one in the same product

  • ← EarlierCVE-2009-1031Mar 19, 2009 · Directory traversal vulnerability in the FTP server in Rhino Software Serv-U File Server 7.0.0.1 through 7.4.0.1 allows remote attackers to
    34Monitor
  • ← EarlierCVE-2009-3655Oct 9, 2009 · Rhino Software Serv-U 7.0.0.1 through 8.2.0.3 allows remote attackers to cause a denial of service (server crash) via unspecified vectors re
    21Monitor
  • Later →CVE-2009-4815Apr 27, 2010 · Directory traversal vulnerability in Serv-U before 9.2.0.1 allows remote authenticated users to read arbitrary files via unspecified vectors
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2010-03-10
Metasploit moduleexploit/windows/http/servu_session_cookieRhinosoft Serv-U Session Cookie Buffer Overflowexploit2009-11-01

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Metasploit-19 d
  2. Published
  3. First PoC+110 d
  4. TodayOct 30, 2026+6188 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
C · data can be read
Integrity
C · data or configuration can be modified
Availability
C · the service can be disrupted
Attack complexity
Low
Confidentiality impact
C
Integrity impact
C
Availability impact
C

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (9 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records