CVE-2022-23596Public exploitNetwork attack vector

Application hang via malformed RAR control flow

Published Feb 1, 2022 · Updated May 5, 2025

Infinite-loop denial of service in Junrar before 7.5.3 allows attackers to hang applications that extract a crafted RAR archive. Malformed archive headers are not fully rejected before extraction, allowing crafted control flow to remain indefinitely in RarVM's unbounded instruction loop. Exposure requires a consuming application to accept attacker-supplied archives and invoke Junrar parsing or extraction; the affected process then consumes CPU without completing.

CVSS severity7.5
High
EPSS probability1.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite-loop denial of service in Junrar before 7.5.3 allows attackers to hang applications that extract a crafted RAR archive. Malformed archive headers are not fully rejected before extraction, allowing crafted control flow to remain indefinitely in RarVM's unbounded instruction loop. Exposure requires a consuming application to accept attacker-supplied archives and invoke Junrar parsing or extraction; the affected process then consumes CPU without completing.

The record

CVE
CVE-2022-23596
Published
Feb 1, 2022
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-835, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 1, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 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

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NISTAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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-835Loop with Unreachable Exit Condition ('Infinite Loop')
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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