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CVE-2020-4126

16
FAUCET Score

CVE-2020-4126 describes a sensitive cookie exposure vulnerability in HCL iNotes, affecting versions prior to 10.0.1 FP6 and 11.0.1 FP2. This medium-severity vulnerability (CVSS 5.9) allows an unauthenticated remote attacker to capture session cookies by intercepting their transmission over HTTP, potentially leading to unauthorized access. While the attack complexity is high, successful exploitation could result in significant confidentiality impact. There is no evidence of active exploitation, public exploit code, or notable community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 9.0, < 10.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:hcl_inotes:*:*:*:*:*:*:*:*
>= 11.0.0, < 11.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:hcl_inotes:*:*:*:*:*:*:*:*
10.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:hcl_inotes:10.0.1:-:*:*:*:*:*:*
10.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:hcl_inotes:10.0.1:fixpack1:*:*:*:*:*:*
10.0.1CPE matchmatch criteria
cpe:2.3:a:hcltech:hcl_inotes:10.0.1:fixpack2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.67%
Probability of exploitation in next 30 days
EPSS Percentile
48.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0067 is in the 9th percentile among its peer group of 19,958 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 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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
Vendor Advisory