CVE-2022-35094Public exploit

Converter crash via DCT Huffman heap read

Published Sep 23, 2022 · Updated May 23, 2025

Heap-buffer overflow in SWFTools commit 772e55a2 allows local users to crash pdf2swf by supplying a crafted PDF file. The DCTStream::readHuffSym path reads one byte through a wild heap pointer while pdf2swf decodes image data embedded in the PDF. Successful exploitation requires a user or local workflow to process the file and terminates the converter; no confidentiality or integrity impact is reported.

CVSS severity5.5
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-buffer overflow in SWFTools commit 772e55a2 allows local users to crash pdf2swf by supplying a crafted PDF file. The DCTStream::readHuffSym path reads one byte through a wild heap pointer while pdf2swf decodes image data embedded in the PDF. Successful exploitation requires a user or local workflow to process the file and terminates the converter; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2022-35094
Published
Sep 23, 2022
Updated
May 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2022CVE publishedPublication date reported by the CVE source.
  2. May 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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