CVE-2021-33798Public exploit

Process crash via malformed project script

Published Jul 7, 2023 · Updated Oct 28, 2024

Null pointer dereference in Panorama Tools libpano13 2.9.20 allows attackers to crash a consuming process via a crafted project file. The panoParserFindOLine function in parser.c scans attacker-controlled project-script text past its valid boundary, causing an invalid read and null-pointer dereference. A user or application must process the crafted file; published evidence substantiates a process crash but not code execution.

CVSS severity6.5
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in Panorama Tools libpano13 2.9.20 allows attackers to crash a consuming process via a crafted project file. The panoParserFindOLine function in parser.c scans attacker-controlled project-script text past its valid boundary, causing an invalid read and null-pointer dereference. A user or application must process the crafted file; published evidence substantiates a process crash but not code execution.

The record

CVE
CVE-2021-33798
Published
Jul 7, 2023
Updated
Oct 28, 2024
Vendor
Panorama Tools
Product
libpano13
Classifications
CWE-476, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.9.20

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Panorama Tools · libpano13version=2.9.20

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.7UbuntuCVSS:3.1/AV:L/AC:H/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.

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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-476NULL Pointer Dereference
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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