Is CVE-2015-8805 in the CISA KEV catalog?

No. CVE-2015-8805 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8805?

CVE-2015-8805 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2015-8805?

CVE-2015-8805 has an EPSS score of 2.79% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8805?

Upgrade nettle on debian 11 to 3.2-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2015-8805

CRITICALEPSS 85th pctl

9.8

CVSS v3

NVD

Description

The ecc_256_modq function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-256 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors, a different vulnerability than CVE-2015-8803.

CWE-310Cryptographic Issues

How to fix

Remediation Available

nettleDebian

Fixed in:3.2-1CVE-2015-8805

libnettle4Ubuntu

Fixed in:2.7.1-1ubuntu0.1USN-2897-1

nettleUbuntu

Fixed in:2.7.1-1ubuntu0.1USN-2897-1

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

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.79%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Patch1

git.lysator.liu.se

Other references9

Related Vulnerabilities

Other CWE-310 (Cryptographic Issues) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-3566	Low	3.4	100%	-	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2015-0204	Medium	4.3	99%	-	Fix
CVE-2016-2107	Medium	5.9	89%	-	Fix
CVE-2016-0800	Medium	5.9	82%	-	Fix
CVE-2014-8684	Critical	9.8	72%	-	-

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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 2026-05-06.