CVE-2021-34833 in the critical feed json
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893.
published 2021-08-04 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21480
- cvss
- 7.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 95.7%
- EPSS 95.7% chance of exploitation in 30 days, percentile 99.8%
- public exploits
- 0
- none known
Summary
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of Annotation objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14023.
Exploit prediction
95.66% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.8 | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Foxit PDF Reader
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
foxit.com
/support/security-bulletins.html
vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-21-915/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-34833
- NVD CVE-2021-34833
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