Cisco Secure Firewall Threat Defense Software HTTP buffer access with incorrect length value

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco Secure Firewall Threat Defense Software, Cyber Vision and UTD SNORT IPS Engine Software. Impacted is an unknown function of the component HTTP Handler. Performing a manipulation results in buffer access with incorrect length value. This vulnerability is reported as CVE-2025-20360. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Cisco Secure Firewall Threat Defense Software, Cyber Vision and UTD SNORT IPS Engine Software (affected version unknown). This affects an unknown functionality of the component HTTP Handler. The manipulation with an unknown input leads to a buffer access with incorrect length value vulnerability. CWE is classifying the issue as CWE-805. The product uses a sequential operation to read or write a buffer, but it uses an incorrect length value that causes it to access memory that is outside of the bounds of the buffer. This is going to have an impact on availability. The summary by CVE is:

Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a lack of complete error checking when the MIME fields of the HTTP header are parsed. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.

It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2025-20360 since 10/10/2024. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/12/2026).

The vulnerability scanner Nessus provides a plugin with the ID 270580 (Multiple Cisco Products Snort 3 MIME DoS Vulnerabilities (cisco-sa-snort3-mime-vulns-tTL8PgVH_CVE-2025-20360)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (270580). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.8
CNA Vector (cisco): 🔒

CVSSv2info

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

Exploitinginfo

Class: Buffer access with incorrect length value
CWE: CWE-805 / CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 270580
Nessus Name: Multiple Cisco Products Snort 3 MIME DoS Vulnerabilities (cisco-sa-snort3-mime-vulns-tTL8PgVH_CVE-2025-20360)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/10/2024 CVE reserved
10/15/2025 +370 days Advisory disclosed
10/15/2025 +0 days VulDB entry created
02/12/2026 +120 days VulDB entry last update

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-snort3-mime-vulns-tTL8PgVH
Status: Confirmed

CVE: CVE-2025-20360 (🔒)
GCVE (CVE): GCVE-0-2025-20360
GCVE (VulDB): GCVE-100-328707

Entryinfo

Created: 10/15/2025 19:28
Updated: 02/12/2026 20:27
Changes: 10/15/2025 19:28 (63), 10/17/2025 08:43 (2), 02/12/2026 20:27 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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