How severe is CVE-2021-43753?

CVE-2021-43753 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43753 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43753?

CVE-2021-43753 affects Adobe Lightroom. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43753?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-43753 published?

CVE-2021-43753 was published on 2023-09-07 and last updated on 2026-06-17.

CVE-2021-43753

CVE-2021-43753 is a high-severity vulnerability in Adobe Lightroom with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-416
Affected product: Adobe Lightroom
Published: 2023-09-07
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-43753?: 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.
How severe is CVE-2021-43753?: CVE-2021-43753 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43753 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43753?: CVE-2021-43753 affects Adobe Lightroom. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43753?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-43753 published?: CVE-2021-43753 was published on 2023-09-07 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:adobe:lightroom:*:*:*:*:*:*:*:*

More vulnerabilities in Adobe Lightroom

CVE-2026-48441 — High (CVSS 8.6): Lightroom Classic is affected by an Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')…
CVE-2026-48397 — High (CVSS 8.6): Lightroom Classic is affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code…
CVE-2026-48410 — High (CVSS 7.8): Lightroom Classic is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in…
CVE-2026-48409 — High (CVSS 7.8): Lightroom Classic is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in…
CVE-2026-48408 — High (CVSS 7.8): Lightroom Classic is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in…
CVE-2026-48407 — High (CVSS 7.8): Lightroom Classic is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in…

All CVEs affecting Adobe Lightroom →

Other CWE-416 (Use After Free) vulnerabilities

CVE-2026-63795 — Critical (CVSS 10.0): In the Linux kernel, the following vulnerability has been resolved: 9p: avoid putting oldfid in p9_client_walk() error…
CVE-2026-13782 — Critical (CVSS 10.0): Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
CVE-2026-4725 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149…
CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…

Browse all CWE-416 (Use After Free) vulnerabilities →