CVE-2020-27636
In Microchip MPLAB Net 3.6.1, TCP ISNs are improperly random.
In Microchip MPLAB Net 3.6.1, TCP ISNs are improperly random.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In Microchip MPLAB Net 3.6.1, TCP ISNs are improperly random.
- Record
CVE-2020-27636- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-330
- Updated
- 2026-11-02
CVE List No score
In Microchip MPLAB Net 3.6.1, TCP ISNs are improperly random.
- Record
CVE-2020-27636- Updated
- 2026-11-02
EUVDEUVD-2020-20143 No score
In Microchip MPLAB Net 3.6.1, TCP ISNs are improperly random.
- Record
EUVD-2020-20143- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hwcm-7pc9-m9x2
In Microchip MPLAB Net 3.6.1, TCP ISNs are improperly random.
In Microchip MPLAB Net 3.6.1, TCP ISNs are improperly random.
- Record
GHSA-hwcm-7pc9-m9x2- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-330
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-27636 is a critical vulnerability (CVSS 9.1) in Microchip Mplab Network Creator, published October 10, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.87%, the 58th percentile. No source names a fixed version.