CVE-2020-4126

HCL iNotes is susceptible to a sensitive cookie exposure vulnerability. This can allow an unauthenticated remote attacker to capture the cookie by intercepting its transmission within an http session. Fixes are available in HCL Domino and iNotes versions 10.0.1 FP6 and 11.0.1 FP2 and later.

Published: 2020-12-01 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-4126 is rated Moderate Risk (43/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.21%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-4126

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2023-03-07 1.05% 0.21% -0.84%
2 2022-04-01 9.03% 1.05% -7.97%
3 2022-02-04 — 9.03% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-4126

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2020-4126

Affected software / configurations for CVE-2020-4126

Vendor Product Version Raw CPE
hcltech hcl_inotes >= 9.0, < 10.0.1 cpe:2.3:a:hcltech:hcl_inotes:*:*:*:*:*:*:*:*
hcltech hcl_inotes >= 11.0.0, < 11.0.1 cpe:2.3:a:hcltech:hcl_inotes:*:*:*:*:*:*:*:*
hcltech hcl_inotes 10.0.1 cpe:2.3:a:hcltech:hcl_inotes:10.0.1:-:*:*:*:*:*:*
hcltech hcl_inotes 10.0.1 cpe:2.3:a:hcltech:hcl_inotes:10.0.1:fixpack1:*:*:*:*:*:*
hcltech hcl_inotes 10.0.1 cpe:2.3:a:hcltech:hcl_inotes:10.0.1:fixpack2:*:*:*:*:*:*
hcltech hcl_inotes 10.0.1 cpe:2.3:a:hcltech:hcl_inotes:10.0.1:fixpack3:*:*:*:*:*:*
hcltech hcl_inotes 10.0.1 cpe:2.3:a:hcltech:hcl_inotes:10.0.1:fixpack4:*:*:*:*:*:*
hcltech hcl_inotes 10.0.1 cpe:2.3:a:hcltech:hcl_inotes:10.0.1:fixpack5:*:*:*:*:*:*
hcltech hcl_inotes 11.0.1 cpe:2.3:a:hcltech:hcl_inotes:11.0.1:-:*:*:*:*:*:*
hcltech hcl_inotes 11.0.1 cpe:2.3:a:hcltech:hcl_inotes:11.0.1:fixpack1:*:*:*:*:*:*

References for CVE-2020-4126

cvelogic Threat Intelligence