CVE-2010-0639

Squid vulnerability

CVSS

5.0

EPSS

30.6%

EPSS pct

98th

Exploited

No known

The htcpHandleTstRequest function in htcp.c in Squid 2.x before 2.6.STABLE24 and 2.7 before 2.7.STABLE8, and htcp.cc in 3.0 before 3.0.STABLE24, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets to the HTCP port.

Affected vendor

Squid Cache

Affected product

Squid

CVSS vector

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

Published

2010-02-15

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 30.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2010-0639

Confirm whether Squid Cache Squid is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2010-0639.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2010-0639

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2010-0639 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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