CVE-2021-40403Public exploitNetwork attack vector

Memory disclosure via uninitialized rotation value

Published Feb 4, 2022 · Updated Apr 15, 2025

Information disclosure in Gerbv 2.7.0, forked 2.8.0, and dev commit b5f1eacd allows remote attackers to leak memory via a crafted file. pick_and_place_parse_file passes an uninitialized PnpPartData.rotation value onward when sscanf fails to parse a numeric rotation, and rendering encodes that stack value in the object's angle. Exposure requires processing attacker-controlled input and access to the rendered output; disclosure is limited to memory inferred from object rotation.

CVSS severity5.8
Medium
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Gerbv 2.7.0, forked 2.8.0, and dev commit b5f1eacd allows remote attackers to leak memory via a crafted file. pick_and_place_parse_file passes an uninitialized PnpPartData.rotation value onward when sscanf fails to parse a numeric rotation, and rendering encodes that stack value in the object's angle. Exposure requires processing attacker-controlled input and access to the rendered output; disclosure is limited to memory inferred from object rotation.

The record

CVE
CVE-2021-40403
Published
Feb 4, 2022
Updated
Apr 15, 2025
Vendor
Gerbv
Product
Gerbv
Classifications
CWE-909, CWE-456
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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?

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

  1. Affected versionversion=Gerbv 2.7.0 ,Gerbv forked 2.8.0 ,Gerbv dev (commit b5f1eacd)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gerbv · Gerbvversion=Gerbv 2.7.0 ,Gerbv forked 2.8.0 ,Gerbv dev (commit b5f1eacd)

Published CVSS scores

5.8Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
6.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-909Missing Initialization of Resource
CWE-456Missing Initialization of a Variable

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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