CVE-2021-43753: Adobe Lightroom TIF File Parsing Use-After-Free Information Disclosure Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-09-07 · updated 2026-06-17
Weakness: CWE-416

Description

Adobe Lightroom versions 4.4 (and earlier) are affected by a use-after-free vulnerability in the processing of parsing TIF files that could result in privilege escalation. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Affected products

Adobe Lightroom Classic: before 5.1 — fixed in 5.1

How to fix

Upgrade to a fixed version: Adobe Lightroom Classic 5.1. Check the vendor advisory for mitigations.

References

https://helpx.adobe.com/security/products/lightroom/apsb21-119.html
https://helpx.adobe.com/security/products/lightroom/apsb21-119.html

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