Is CVE-2017-7507 in the CISA KEV catalog?

No. CVE-2017-7507 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-7507?

CVE-2017-7507 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2017-7507?

CVE-2017-7507 has an EPSS score of 3.41% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-7507?

Upgrade gnutls28 on debian 11 to 3.5.8-6 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2017-7507

HIGHEPSS 87th pctl

7.5

CVSS v3

NVD

Description

GnuTLS version 3.5.12 and earlier is vulnerable to a NULL pointer dereference while decoding a status response TLS extension with valid contents. This could lead to a crash of the GnuTLS server application.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

gnutls28Debian

Fixed in:3.5.8-6CVE-2017-7507

gnutls26Ubuntu

Fixed in:2.12.23-12ubuntu2.8USN-3318-1

gnutls28Ubuntu

Fixed in:3.4.10-4ubuntu1.3USN-3318-1

libgnutls26Ubuntu

Fixed in:2.12.23-12ubuntu2.8USN-3318-1

libgnutls30Ubuntu

Fixed in:3.4.10-4ubuntu1.3USN-3318-1

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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

3.41%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Vendor Advisory1

gnutls.org

Third-Party Advisory1

securityfocus.com

Other references2

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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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.