Is CVE-2017-8807 in the CISA KEV catalog?

No. CVE-2017-8807 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-8807?

CVE-2017-8807 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2017-8807?

CVE-2017-8807 has an EPSS score of 4.08% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-8807?

Upgrade varnish on debian 11 to 5.2.1-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2017-8807

CRITICALEPSS 89th pctl

9.1

CVSS v3

NVD

Description

vbf_stp_error in bin/varnishd/cache/cache_fetch.c in Varnish HTTP Cache 4.1.x before 4.1.9 and 5.x before 5.2.1 allows remote attackers to obtain sensitive information from process memory because a VFP_GetStorage buffer is larger than intended in certain circumstances involving -sfile Stevedore transient objects.

CWE-119Buffer Overflow

How to fix

Remediation Available

varnishDebian

Fixed in:5.2.1-1CVE-2017-8807

libvarnishapi1Ubuntu

Fixed in:4.1.1-1ubuntu0.2+esm1USN-4824-1

varnishUbuntu

Fixed in:4.1.1-1ubuntu0.2+esm1USN-4824-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Exploit Intelligence

4.08%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% of all known CVEs.

References

Patch2

Vendor Advisory1

github.com

Third-Party Advisory3

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.