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% (33rd 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% (33rd 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% (33rd 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:*:*:*:*:*:*:*:*

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