CVE-2024-25679Public exploitNetwork attack vector

Connection disruption via retained Initial encryption keys

Published Feb 9, 2024 · Updated Jun 16, 2025

Key-retention error in PQUIC before 5bde5bb allows attackers to close PSK connections by forging an Initial-key frame. The handshake transition leaves crypto_context[0] available after Initial keys should be discarded, so a captured key still decrypts an injected CONNECTION_CLOSE frame. Exploitation requires visibility into connection-establishment traffic and a PSK configuration; the bounded consequence is termination of the targeted QUIC connection.

CVSS severity6.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Key-retention error in PQUIC before 5bde5bb allows attackers to close PSK connections by forging an Initial-key frame. The handshake transition leaves crypto_context[0] available after Initial keys should be discarded, so a captured key still decrypts an injected CONNECTION_CLOSE frame. Exploitation requires visibility into connection-establishment traffic and a PSK configuration; the bounded consequence is termination of the targeted QUIC connection.

The record

CVE
CVE-2024-25679
Published
Feb 9, 2024
Updated
Jun 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-324, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L
6.5CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L

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-324Use of a Key Past its Expiration Date
T1499.004Application or System Exploitation

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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