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CVE-2020-14268

24
FAUCET Score

CVE-2020-14268 is a critical stack buffer overflow vulnerability affecting HCL Notes client versions 9 and 10, specifically in its MIME message handling. An unauthenticated attacker can exploit this remotely with low complexity, potentially leading to client crashes or arbitrary code execution with the client's privileges, as indicated by its CVSS score of 9.8. Despite its high severity and FAUCET Risk Score of 81/100, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 9.0, < 9.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:notes:*:*:*:*:*:*:*:*
>= 10.0, < 10.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:notes:*:*:*:*:*:*:*:*
9.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:notes:9.0.1:-:*:*:*:*:*:*
9.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:notes:9.0.1:fp10:*:*:*:*:*:*
9.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:notes:9.0.1:fp10if1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.23%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0223 is in the 70th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.hcltechsw.com / csm
PatchVendor Advisory