CVE-2026-20058 describes multiple denial-of-service vulnerabilities in the Snort 3 VBA feature across various Cisco products, stemming from improper error checking during VBA data decompression. An unauthenticated, remote attacker can exploit this by sending crafted VBA data, causing the Snort 3 Detection Engine to crash and restart, leading to a DoS condition. Rated 5.8 MEDIUM, the attack requires no user interaction and has low impact on availability. There is no evidence of active exploitation, public exploit code, or KEV listing, though it has garnered some community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.0, 7.2.0.1, 7.2.1, 7.2.10, 7.2.10.2, 7.2.2, 7.2.3, 7.2.4, 7.2.4.1, 7.2.5, 7.2.5.1, 7.2.5.2, 7.2.6, 7.2.7, 7.2.8, 7.2.8.1, 7.2.9, 7.3.0, 7.3.1, 7.3.1.1, 7.3.1.2, 7.4.0, 7.4.1, 7.4.1.1, 7.4.2, 7.4.2.1, 7.4.2.2, 7.4.2.3, 7.4.2.4, 7.4.3, 7.6.0, 7.6.1, 7.6.2, 7.6.2.1, 7.7.0, 7.7.10, 7.7.10.1CNA affecteddefault unknown | |
| Cisco | Cisco UTD SNORT IPS Engine Software | 17.12.1a, 17.12.2, 17.12.3, 17.12.3a, 17.12.4, 17.12.4a, 17.12.4b, 17.12.5, 17.12.5a, 17.12.5b, 17.12.5c, 17.12.5d, 17.12.6, 17.13.1a, 17.14.1a, 17.15.1a, 17.15.2a, 17.15.2c, 17.15.3, 17.15.3a, 17.15.4, 17.15.4c, 17.16.1a, 17.17.1, 17.18.1, 17.18.1a, 17.18.2, 17.9.3a, 17.9.5a, 17.9.6CNA affecteddefault unknown |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.