CVE-2009-4171 json
An ActiveX control in YahooBridgeLib.dll for Yahoo!
published 2009-12-02 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-4141
- cvss
- 4.3
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.1%
- EPSS 5.1% chance of exploitation in 30 days, percentile 92%
- public exploits
- 2
- Exploit-DB
Summary
An ActiveX control in YahooBridgeLib.dll for Yahoo! Messenger 9.0.0.2162, and possibly other 9.0 versions, allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) by calling the RegisterMe method with a long argument.
Timeline
- First public exploit (EDB-33350)
- Published
Exploit prediction
5.09% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-33350 Yahoo! Messenger 9 - 'YahooBridgeLib.dll' ActiveX Control Remote Denial of Service dos, 2009-11-12
- EDB-10092 Yahoo! Messenger 9.0.0.2162 - 'YahooBridgeLib.dll' ActiveX Control Remote Denial of Service dos, 2009-11-12
- securityfocus.com http://www.securityfocus.com/bid/37007 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
-
securityfocus.com
/bid/37007
vdb-entry, exploit
-
securityfocus.com
/archive/1/507818/100/0/threaded
mailing-list
-
exchange.xforce.ibmcloud.com
/vulnerabilities/54263
vdb-entry
Sources
- CVE List CVE-2009-4171
- NVD CVE-2009-4171
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.