CVE-2022-26320Public exploitNetwork attack vector

Private-key recovery via closely spaced RSA primes

Published Mar 14, 2022 · Updated Oct 7, 2024

Weak RSA key generation in Rambus SafeZone Basic Crypto Module before 10.4.0 allows attackers to recover private keys from public keys. The speed-optimized, multithreaded CLS_PK_KeyGenMT function can select RSA primes p and q without sufficient distance, enabling efficient Fermat factorization. Exposure requires an RSA public key generated by that function; recovery compromises the confidentiality and authenticity protected by the key.

CVSS severity9.1
Critical
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak RSA key generation in Rambus SafeZone Basic Crypto Module before 10.4.0 allows attackers to recover private keys from public keys. The speed-optimized, multithreaded CLS_PK_KeyGenMT function can select RSA primes p and q without sufficient distance, enabling efficient Fermat factorization. Exposure requires an RSA public key generated by that function; recovery compromises the confidentiality and authenticity protected by the key.

The record

CVE
CVE-2022-26320
Published
Mar 14, 2022
Updated
Oct 7, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-330, T1552.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-330Use of Insufficiently Random Values
T1552.004Unsecured Credentials: Private Keys

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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