CVE-2025-69720Public exploit

Tool crash via unchecked terminfo substring copy

Published Mar 19, 2026 · Updated Mar 19, 2026

Stack-based buffer overflow in GNU ncurses infocmp before 6.5-20251213 allows local users to crash the tool via crafted terminfo data. In analyze_string(), strlen(cp) determines a strncpy length into the 4,096-byte stack buffer buf2 without checking that the substring fits. A victim must run infocmp in initialization-analysis mode against the crafted entry; ordinary invocations do not reach the affected path.

CVSS severity7.3
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in GNU ncurses infocmp before 6.5-20251213 allows local users to crash the tool via crafted terminfo data. In analyze_string(), strlen(cp) determines a strncpy length into the 4,096-byte stack buffer buf2 without checking that the substring fits. A victim must run infocmp in initialization-analysis mode against the crafted entry; ordinary invocations do not reach the affected path.

The record

CVE
CVE-2025-69720
Published
Mar 19, 2026
Updated
Mar 19, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, CWE-120, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 2026Record 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.3MITRECVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-121CWE-121 Stack-based Buffer Overflow
CWE-120CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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