Microsoft Outlook 16.83.3 on macOS Library signature verification

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Microsoft Outlook 16.83.3 on macOS. This impacts an unknown function of the component Library Handler. This manipulation causes signature verification. This vulnerability appears as CVE-2024-42220. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability has been found in Microsoft Outlook 16.83.3 on macOS and classified as problematic. Affected by this vulnerability is some unknown functionality of the component Library Handler. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A library injection vulnerability exists in Microsoft Outlook 16.83.3 for macOS. A specially crafted library can leverage Outlook's access privileges, leading to a permission bypass. A malicious application could inject a library and start the program to trigger this vulnerability and then make use of the vulnerable application's permissions.

The advisory is shared at talosintelligence.com. This vulnerability is known as CVE-2024-42220 since 08/05/2024. The exploitation appears to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/23/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CNA Base Score: 7.1
CNA Vector (talos): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/05/2024 🔍
12/18/2024 +135 days 🔍
12/18/2024 +0 days 🔍
08/23/2025 +248 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: TALOS-2024-1972
Status: Confirmed

CVE: CVE-2024-42220 (🔍)
GCVE (CVE): GCVE-0-2024-42220
GCVE (VulDB): GCVE-100-288913

Entryinfo

Created: 12/18/2024 23:54
Updated: 08/23/2025 03:00
Changes: 12/18/2024 23:54 (64), 12/19/2024 18:21 (1), 08/23/2025 03:00 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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