Celestial AbsoluteTelnet 11.12 SSH2 username buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Celestial AbsoluteTelnet 11.12. Impacted is an unknown function. The manipulation of the argument SSH2 username results in buffer overflow. This vulnerability is cataloged as CVE-2020-37166. The attack must be initiated from a local position. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Celestial AbsoluteTelnet 11.12. Affected is an unknown part. The manipulation of the argument SSH2 username with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

AbsoluteTelnet 11.12 contains a denial of service vulnerability in the SSH2 username input field that allows local attackers to crash the application. Attackers can overwrite the username field with a 1000-byte buffer, causing the application to become unresponsive and terminate.

The weakness was shared by chuyreds as 48010. The advisory is shared for download at exploit-db.com. This vulnerability is traded as CVE-2020-37166 since 02/06/2026. The exploitability is told to be easy. The attack needs to be approached locally. Technical details and a public exploit are known.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (48010). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 6.2
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Exploit-DB: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/06/2026 CVE reserved
02/07/2026 +1 days Advisory disclosed
02/07/2026 +0 days VulDB entry created
02/19/2026 +12 days VulDB entry last update

Sourcesinfo

Advisory: 48010
Researcher: chuyreds
Status: Not defined

CVE: CVE-2020-37166 (🔒)
GCVE (CVE): GCVE-0-2020-37166
GCVE (VulDB): GCVE-100-344844
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/07/2026 08:46
Updated: 02/19/2026 20:14
Changes: 02/07/2026 08:46 (81), 02/19/2026 20:14 (9)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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