CVE-2023-27323: Parallels Desktop Updater Time-Of-Check Time-Of-Use Local Privilege Escalation Vulnerability

Q: How do I fix CVE-2023-27323?

parallels desktop: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2023-27323 being exploited?

CVE-2023-27323 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-27323 affect?

CVE-2023-27323 affects parallels desktop. Severity is high (CVSS 7.8). Parallels Desktop Updater Time-Of-Check Time-Of-Use Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop. An attacker must first obtain the

Routine

HIGH 7.8MITIGATE

CVE-2023-27323 is a high-severity flaw (CVSS 7.8) affecting parallels desktop. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Parallels Desktop Updater Time-Of-Check Time-Of-Use Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop. An attacker must first obtain the ability to execute low-privileged code on the target host system in order to exploit this vulnerability. The specific flaw exists within the Updater service. By creating a symbolic link, an attacker can abuse

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-367
Published	2024-05-03
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: parallels

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-05-03 02:15 UTCPublished CVE record published
2026-06-17 05:44 UTCUpdated Record last modified

parallels parallels desktop MITIGATE

Affected: < 18.1.0_\(53311\)

Fixed in: 18.1.0_\(53311\)

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy parallels-desktop || rpm -q parallels-desktop || parallels-desktop --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-27323?

parallels desktop: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-27323 being exploited?

CVE-2023-27323 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-27323 affect?

CVE-2023-27323 affects parallels desktop. Severity is high (CVSS 7.8). Parallels Desktop Updater Time-Of-Check Time-Of-Use Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop. An attacker must first obtain the

How urgent is CVE-2023-27323?

Priority 30/100. High severity

Related CVEs

CVE-2025-31359 HIGH 8.8 MITIGATE A directory traversal vulnerability exists in the PVMP package unpacking functionality of Parallels Desktop fo
CVE-2024-6240 HIGH 7.7 UPGRADE Improper privilege management vulnerability in Parallels Desktop Software, which affects versions earlier than
CVE-2024-6154 MEDIUM 6.7 UPGRADE Parallels Desktop Toolgate Heap-based Buffer Overflow Local Privilege Escalation Vulnerability
CVE-2024-6153 HIGH 7.8 UPGRADE Parallels Desktop Updater Protection Mechanism Failure Software Downgrade Vulnerability
CVE-2024-54189 HIGH 7.8 MITIGATE A privilege escalation vulnerability exists in the Snapshot functionality of Parallels Desktop for Mac version

References

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