CVE-2015-4054

PgBouncer before 1.5.5 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by sending a password packet before a startup packet.

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CVSS v3.1

7.5 HIGH

EPSS

4.13%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

EPSS Trend

Aug 16, 2026 → Sep 7, 2026

● 0.00pp

4.13% → 4.13% over 7 tracked changes

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

ScopeUNCHANGED

ConfidentialityNONE

IntegrityNONE

AvailabilityHIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Connections

2 relationships

CWE-476

source

Timeline

disclosure → media coverage

May 23, 2017

Disclosure — published as a CVE record. · last revised by NVD May 13, 2026