CVE-2022-42159Network attack vector

Predictable random outputs via weak PRNG seeding

Published Oct 13, 2022 · Updated May 16, 2025

Predictable PRNG seeding in D-Link COVR 1200, 1202, and 1203 firmware 1.08 allows remote authenticated users to predict generated values. The public record states only that the pseudo-random number generator uses a predictable seed; it does not identify the function, seed source, or security-sensitive value generated. Network access with low privileges is required, and the published assessment reports limited integrity impact without confidentiality or availability impact.

CVSS severity4.3
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable PRNG seeding in D-Link COVR 1200, 1202, and 1203 firmware 1.08 allows remote authenticated users to predict generated values. The public record states only that the pseudo-random number generator uses a predictable seed; it does not identify the function, seed source, or security-sensitive value generated. Network access with low privileges is required, and the published assessment reports limited integrity impact without confidentiality or availability impact.

The record

CVE
CVE-2022-42159
Published
Oct 13, 2022
Updated
May 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-335
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 13, 2022CVE publishedPublication date reported by the CVE source.
  2. May 16, 2025Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-335Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

Public exploit references

No public exploit references are available in this record.

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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