HOMEVULNERABILITIESCVE-2016-7966
HIGH

CVE-2016-7966

CWE-94Published: December 23, 2016· Updated: Jun 17, 2026

7.3
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2016-7966 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
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

Affected Vendors & Products

Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
kde1 product(s)
kmail
SUSE1 product(s)
linux enterprise
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://lists.opensuse.org/opensuse-updates/2016-10/msg00065.html
ADVISORYhttp://www.debian.org/security/2016/dsa-3697
ADVISORYhttp://www.openwall.com/lists/oss-security/2016/10/05/1
ADVISORYhttp://www.securityfocus.com/bid/93360
ADVISORYhttp://lists.opensuse.org/opensuse-updates/2016-10/msg00065.html
ADVISORYhttp://www.debian.org/security/2016/dsa-3697
ADVISORYhttp://www.openwall.com/lists/oss-security/2016/10/05/1
ADVISORYhttp://www.securityfocus.com/bid/93360

All References (10)

→
http://lists.opensuse.org/opensuse-updates/2016-10/msg00065.htmlThird Party Advisory
→
http://www.debian.org/security/2016/dsa-3697Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2016/10/05/1Third Party Advisory
→
http://www.securityfocus.com/bid/93360Third Party Advisory · VDB Entry
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNMM5TVPTJQFPJ3YDF4DPXDFW3GQLWLY/
→
http://lists.opensuse.org/opensuse-updates/2016-10/msg00065.htmlThird Party Advisory
→
http://www.debian.org/security/2016/dsa-3697Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2016/10/05/1Third Party Advisory
→
http://www.securityfocus.com/bid/93360Third Party Advisory · VDB Entry
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNMM5TVPTJQFPJ3YDF4DPXDFW3GQLWLY/

Quick Facts

CVE IDCVE-2016-7966
CVSS Score7.3 / 10
SeverityHIGH
WeaknessCWE-94
CISA KEVNo
Affected4 vendor(s)
PublishedDec 23, 2016

Related CVEs (CWE-94)

CVE-2008-5694
10.0
CVE-2008-5866
10.0
CVE-2008-5227
10.0
CVE-2008-4188
10.0
CVE-2008-5801
10.0
CVE-2009-0720
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2016-7966 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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