CVE-2026-76504 (GCVE-0-2026-76504)
Vulnerability from cvelistv5 – Published: 2026-09-30 13:04 – Updated: 2026-10-01 03:55- CWE-177 - Improper Handling of URL Encoding (Hex Encoding)
| URL | Tags |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/c… | |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Manager |
Affected:
18.3.6
Affected: 18.3.7 Affected: 18.3.8 Affected: 17.2.10 Affected: 18.3.6.1 Affected: 18.2.0 Affected: 18.4.3 Affected: 18.4.1 Affected: 17.2.8 Affected: 18.3.3.1 Affected: 18.4.0 Affected: 18.3.1 Affected: 17.2.6 Affected: 17.2.9 Affected: 18.3.4 Affected: 17.2.5 Affected: 18.3.1.1 Affected: 18.3.5 Affected: 18.4.0.1 Affected: 18.3.3 Affected: 17.2.7 Affected: 17.2.4 Affected: 18.3.0 |
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
Exploited: Yes
Timestamps
Scope
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-177 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Catalyst SD-WAN Manager |
| Due Date | 2026-10-03 |
| Date Added | 2026-09-30 |
| Vendorproject | Cisco |
| Vulnerabilityname | Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
Exploited: Yes
Timestamps
Scope
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability |
| Cve Id | CVE-2026-76504 |
| Vendor | Cisco |
| Ghsa Id | GHSA-XQJC-V467-8FVF |
| Product | Cisco Catalyst SD-WAN Manager |
| Added Date | 2026-09-30T13:49:09.169Z |
| Cvss Score | 9.8 |
| Epss Score | None |
| Previous Ids | |
| Cvss Severity | CRITICAL |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | None |
| Used In Malware | unknown |
| Vulnerability Id | CVE-2026-76504 |
| Ahead Of Cisa Kev |
|
| Not Yet In Cisa Kev | False |
References
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.