- 5.8MediumCVSS base score
- 0.44%Exploitation in 30 daysEPSS · top 61% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability in a policy-based Cisco Application Visibility and Control (AVC) implementation of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to evade the antivirus scanner and download a malicious file onto an endpoint. The vulnerability is due to improper handling of a crafted range request header. An attacker could exploit this vulnerability by sending an HTTP request with a crafted range request header through the affected device. A successful exploit could allow the attacker to evade the antivirus scanner and download malware onto the endpoint without detection by Cisco Secure Web Appliance.
Timeline
ID reserved
By cisco
- 4 months later
· 4 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ciscoCNA (assigner) | 3.1 | Medium5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N |
| NVDNVD · Analyzed | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.44% · top 61% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.8.
Affected products
Cisco · Cisco Secure Web Appliance
- affected 11.8.0-453
- affected 12.5.3-002
- affected 12.0.3-007
- affected 12.0.3-005
- affected 14.1.0-032
- affected 14.1.0-047
- affected 14.1.0-041
- affected 12.0.4-002
- affected 14.0.2-012
- affected 11.8.0-414
- affected 12.0.1-268
- affected 11.8.1-023
- affected 11.8.3-021
- affected 11.8.3-018
- affected 12.5.1-011
- affected 11.8.4-004
- affected 12.5.2-007
- affected 12.5.2-011
- affected 14.5.0-498
- affected 12.5.4-005
- affected 12.5.4-011
- affected 12.0.5-011
- affected 14.0.3-014
- affected 12.5.5-004
- affected 12.5.5-005
- affected 12.5.5-008
- affected 14.0.4-005
- affected 14.5.1-008
- affected 14.5.1-016
- affected 15.0.0-355
- affected 15.0.0-322
- affected 12.5.6-008
- affected 15.1.0-287
- affected 14.5.2-011
- affected 15.2.0-116
- affected 14.0.5-007
- affected 15.2.0-164
- affected 14.5.1-510
- affected 12.0.2-012
- affected 12.0.2-004
- and 11 more
What to do
Exploitation: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-2171 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-20183)Record last updated .