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CVE-2016-5825

16
FAUCET Score

CVE-2016-5825 describes an out-of-bounds heap read vulnerability in the icalparser_parse_string function of libical versions 0.47 and 1.0, affecting the libical_project. This medium-severity vulnerability (CVSS 5.5) can lead to a denial of service, requiring user interaction to process a crafted .ics file. There is no evidence of active exploitation, no publicly available exploit code in Metasploit, Nuclei, or ExploitDB, and minimal community discussion or media coverage, indicating low current threat activity.

Impacted Technologies

VendorProductVersion(s)CPE
0.47CPE matchmatch criteria
cpe:2.3:a:libical_project:libical:0.47:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:libical_project:libical:1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.51%
Probability of exploitation in next 30 days
EPSS Percentile
71.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0151 is in the 82nd percentile among its peer group of 5,758 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (4)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libical
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird

Vendor Advisories (1)

redhatCVE-2016-5825Low

libical: Heap buffer over-read in icalparser_parse_string function

Jun 25, 2016

References

bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
openwall.com / lists/oss-security/2016/06/25/4
Mailing ListThird Party Advisory
securityfocus.com / bid/91459
Third Party AdvisoryVDB Entry