# CVE-2020-25658

## Summary

- **CVE ID:** CVE-2020-25658
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
- **CWE:** CWE-385
- **Published:** Nov 12, 2020
- **Last Modified:** Mar 14, 2026

## Description

It was found that python-rsa is vulnerable to Bleichenbacher timing attacks. An attacker can use this flaw via the RSA decryption API to decrypt parts of the cipher text encrypted with RSA.

## Affected Products

- Sybren A. Stüvel — python-rsa (after 3.0 (inclusive))

## References

- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25658)
- [CNA](https://github.com/sybrenstuvel/python-rsa/issues/165)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SAF67KDGSOHLVFTRDOHNEAFDRSSYIWA/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QY4PJWTYSOV7ZEYZVMYIF6XRU73CY6O7/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APF364QJ2IYLPDNVFBOEJ24QP2WLVLJP/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.23%
- **EPSS Percentile:** 45.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._