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Fencer Vulns
high 7.5

CVE-2021-1296 json

Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Arbitrary File Write Vulnerabilities

published 2021-02-04 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-6763

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers could allow an unauthenticated, remote attacker to conduct directory traversal attacks and overwrite certain files that should be restricted on an affected system. These vulnerabilities are due to insufficient input validation. An attacker could exploit these vulnerabilities by using the web-based management interface to upload a file to location on an affected device that they should not have access to. A successful exploit could allow the attacker to overwrite files on the file system of the affected device.

Patch / fix

  • cisco rv160w_wireless-ac_vpn_router_firmware 1.0.01.02
  • cisco rv260_vpn_router_firmware 1.0.01.02
  • cisco rv260p_vpn_router_with_poe_firmware 1.0.01.02
  • cisco rv260w_wireless-ac_vpn_router_firmware 1.0.01.02
  • cisco rv160_vpn_router_firmware 1.0.01.02

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

3.73% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 9.4 AV:N/AC:L/Au:N/C:N/I:C/A:C

Affected products

  • Cisco Cisco Small Business RV Series Router Firmware

Classification

Weakness
  • CWE-36 Absolute Path Traversal
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.