Critical severity · published Oct 10, 2023
CVE-2020-27636
In Microchip MPLAB Net 3.6.1, TCP ISNs are improperly random
9.1
CVSS
0.9%
EPSS
No
On KEV
Description
In Microchip MPLAB Net 3.6.1, TCP ISNs are improperly random.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MN
Mplab Network Creator · Microchip
3.6.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27636
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27636
Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01
Third Party Advisory
https://www.forescout.com
Third Party Advisory
https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/