A vulnerability in the input parameter handling of HCL Notes v9 could potentially be exploited by an authenticated attacker resulting in a s
A vulnerability in the input parameter handling of HCL Notes v9 could potentially be exploited by an authenticated attacker resulting in a stack buffer overflow. This could allow the attacker to crash the program or inject code into the system which would execute with the privileges of the currently logged in user.
- Published
- Dec 17, 2020
- Updated
- Jun 16, 2026
- EPSS
- 1.3% · 69th percentile
- CWE
- —
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Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| hcltech | notes | cpe:2.3:a:hcltech:notes |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- hcltech notes9.0
- hcltech notes9.0.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (HCL). Independent of NVD's CPE analysis and usually ahead of it.
n/a HCL Notes
- v9affected
Same product
hcltech: all recordsOther highest-scoring records for the same primary product.
- CVE-2020-14224A vulnerability in the MIME message handling of the HCL Notes v9 client could potentially be exploited by an unauthenticated attacker result40Plan
- CVE-2020-14268A vulnerability in the MIME message handling of the Notes client (versions 9 and 10) could potentially be exploited by an unauthenticated at40Plan
- CVE-2022-44755HCL Notes is susceptible to a stack based buffer overflow vulnerability in lasr.dll in Micro Focus KeyView31Monitor
- CVE-2022-44753HCL Notes is susceptible to a stack based buffer overflow vulnerability in wp6sr.dll in Micro Focus KeyView31Monitor
- CVE-2022-44751HCL Notes is susceptible to a stack based buffer overflow vulnerability in lasr.dll in Micro Focus KeyView31Monitor
- CVE-2020-14258HCL Notes is susceptible to a Denial of Service vulnerability caused by improper validation of user-supplied input.30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.