Skip to content
CVE Tracker
Back

CVE-2009-20009

Belkin Bulldog Plus Web Service Buffer Overflow

Critical9.3EPSS 1.8%
Published
Updated
Reserved
Assigned by
VulnCheck

Description

Belkin Bulldog Plus version 4.0.2 build 1219 contains a stack-based buffer overflow vulnerability in its web service authentication handler. When a specially crafted HTTP request is sent with an oversized Authorization header, the application fails to properly validate the input length before copying it into a fixed-size buffer, resulting in memory corruption and potential remote code execution. Exploitation requires network access and does not require prior authentication.

Scores

CVSS scores of CVE-2009-20009, by who scored it
Scored byCVSSScoreVector
VulnCheckCNA (assigner)4.0Critical9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
NVDNVD · Deferred4.0Critical9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
1.8% · top 21% of all CVEs (3 Nov 2026)
CISA SSVC
Exploitation: poc · Automatable: yes · Technical impact: total

Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.3.

Weakness

Affected products

  • Belkin International, Inc. · Bulldog Plus UPS Monitoring Software

    • affected ≤ 4.0.2 build 1219

References (5)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .