VulnerabilityPublished 30 Oct 2026

CVE-2026-62298: mouse07410 asn1c · NULL Pointer Dereference

Affects mouse07410 asn1cSource CVE Database V5

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Not known to be exploited · CVSS 0.0 Medium : upgrade to 1.2.5 when convenient.

Data as of 30 Oct 2026, 19:19 UTC

CVSS 4.0 base score

0.0Medium

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (GitHub_M)	CVSS 4.0	0.0

Patch: Available – fixed in 1.2.5

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: None
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 30 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade asn1c and mouse07410/asn1c to 1.2.5.

Affected software

Product	Affected	Fixed in
mouse07410asn1c	Affected <1.2.5	Fixed in 1.2.5
GitHubmouse07410/asn1c`pkg:github/mouse07410/asn1c`Other threats	Affected <1.2.5	Fixed in 1.2.5

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade to mouse07410/asn1c version 1.2.5 or later, where this NULL pointer dereference issue is fixed. No other mitigation is indicated or required.

Description

CVE-2026-62298 is a NULL pointer dereference vulnerability in the mouse07410 ASN.1 compiler (asn1c) prior to version 1.2.5. The flaw occurs during OPEN TYPE decoding in multiple functions handling different encoding rules (APER, BER, OER, UPER). An unallocated member pointer can be dereferenced, causing a segmentation fault and crashing the consuming program. This issue is fixed in version 1.2.5.

Impact

Exploitation of this vulnerability causes a NULL pointer dereference, leading to a segmentation fault and crash of the application using the vulnerable ASN.1 compiler. This can result in denial of service but does not indicate code execution or data corruption. There are no known exploits in the wild.

Summary

The vulnerability in mouse07410/asn1c affects versions before 1.2.5 and involves improper handling of OPEN TYPE decoding in ASN.1 data. Specifically, functions OPEN_TYPE_aper_get, OPEN_TYPE_ber_get, OPEN_TYPE_oer_get, and OPEN_TYPE_uper_get perform a conditional null check on a member pointer but then unconditionally perform pointer arithmetic and dereference, leading to a NULL pointer dereference if the member is not allocated. This results in a segmentation fault crash of the consuming application. The advisory includes reproducer examples for UPER and APER encodings and identifies E2AP protocol usage of APER as affected. The vulnerability is addressed in version 1.2.5.

CWE-476NULL Pointer Dereference (opens in a new tab)
Base weaknessLikelihood of exploit: MediumCWE Top 25 (2025): #13OWASP Top 10 A10:2025: Mishandling of Exceptional Conditions (opens in a new tab)
The product dereferences a pointer that it expects to be valid but is NULL.
Implementation
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
Requirements
Select a programming language that is not susceptible to these issues.
Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
OWASP Cheat Sheets
Logging (opens in a new tab)
Error Handling (opens in a new tab)
OWASP ASVS 4.0.3
V11.1.7 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Oct 2026, 19:04 UTC

WeaknessesCWE-476

Technical details

References

Community reviews

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