CVE-2020-20950: n/a vulnerability

CVE-2020-20950: Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA in Microchip Libraries for Applications 2018-11-26...

Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA in Microchip Libraries for Applications 2018-11-26 All up to 2018-11-26. The vulnerability can allow one to use Bleichenbacher's oracle attack to decrypt an encrypted ciphertext by making successive queries to the server using the vulnerable library, resulting in remote information disclosure.

UnknownCVSS not scoredNot KEV-listedUpdatedJul 9, 2026, 00:09 UTC (UTC+00:00)

Security readout for executives and security teams

This CVE describes a cryptographic weakness in Microchip Libraries for Applications up to the 2018-11-26 release. If an exposed service uses the vulnerable RSA PKCS #1 v1.5 behavior, an attacker may be able to recover encrypted information through repeated interaction. Exposure is most likely in embedded, IoT, or application code that incorporated Microchip Libraries for Applications up to 2018-11-26 and exposes RSA decryption behavior remotely. Treat this as an exposure-discovery priority, not a confirmed emergency. Escalate quickly if the vulnerable library is found in internet-facing products handling sensitive encrypted traffic. Mitigation focus: Inventory products using Microchip Libraries for Applications up to 2018-11-26.; Check Microchip guidance for current library status and recommended updates.; Prioritize externally reachable services that perform RSA PKCS #1 v1.5 decryption..

Prepared: Jul 11, 2026, 12:20 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jan 19, 2021, 12:22 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

1ADP providers

3Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Aug 13, 2020, 00:00 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Jan 19, 2021, 12:22 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Jul 9, 2026, 00:09 UTC (UTC+00:00)

ADP provider summaries

Source materials

CVE List V5 sourceCVE List V5
https://www.microchip.com/mplab/microchip-libraries-for-applicationsCVE reference, mitre
https://bi-zone.medium.com/silence-will-fall-or-how-it-can-take-2-years-to-get-your-vuln-registered-e6134846f5bbCVE reference, mitre

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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