Is CVE-2016-7966 in the CISA KEV catalog?

No. CVE-2016-7966 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-7966?

CVE-2016-7966 has a CVSS v3 base score of 7.3 (HIGH).

What is the EPSS score for CVE-2016-7966?

CVE-2016-7966 has an EPSS score of 2.34% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-7966?

Upgrade kcoreaddons on debian 11 to 5.26.0-3 or later.

CVE & CISA-KEV Catalog

CVE-2016-7966

HIGHEPSS 82th pctl

7.3

CVSS v3

NVD

Description

Through a malicious URL that contained a quote character it was possible to inject HTML code in KMail's plaintext viewer. Due to the parser used on the URL it was not possible to include the equal sign (=) or a space into the injected HTML, which greatly reduces the available HTML functionality. Although it is possible to include an HTML comment indicator to hide content.

CWE-94Code Injection

How to fix

Remediation Available

kcoreaddonsDebian

Fixed in:5.26.0-3CVE-2016-7966

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

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

2.34%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Third-Party Advisory4

Other references1

lists.fedoraproject.org

Related Vulnerabilities

Other CWE-94 (Code Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-9841	Critical	9.8	100%	KEV	Fix
CVE-2015-1635	Critical	9.8	100%	KEV	-
CVE-2022-22954	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-22204	Medium	6.8	100%	KEV	Fix
CVE-2025-3248	Critical	9.8	100%	KEV	Fix
CVE-2012-0158	High	8.8	100%	KEV	-

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HTML

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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.