Vulnerability · CVE-2025-7921
Certain modem models developed by Askey has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and poten
Published Jul 21, 2025 · catalog updated Jul 21, 2025 · ASKEY RTF8207w
Last checked Oct 26, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-7921. EPSS is 0.95%. Act only if a listed version of ASKEY RTF8207w is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Critical9.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.95%
- Remediation
- Version ranges on file
- Affected products
- vendor ASKEY RTF8207w 0 <R82XXR250718
Certain modem models developed by Askey has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and potentially execute arbitrary code.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor ASKEY RTF8207w 0 <R82XXR2507180 <R82XXR250718
How to fix CVE-2025-7921
Upgrade
CVE-2025-7921 lists a fix boundary at R82XXR250718. Compare the installed build with that boundary before you change production.
Version check
Seen in 0 <R82XXR250718
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-7921. EPSS is 0.95%. Act only if a listed version of ASKEY RTF8207w is installed.
Which versions are affected?
Compare what you have installed with ASKEY RTF8207w 0 <R82XXR250718 0 <R82XXR250718. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.95%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Jul 21, 2025 · EUVD
Detected
Certain modem models developed by Askey has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and potentially execute arbitrary code.
Jul 21, 2025 · EUVD
Updated
Certain modem models developed by Askey has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and potentially execute arbitrary code.
Sources
- CVE.orgVulnerability recordCVE-2025-7921
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-7921
30-day exploitation probability 0.95%
first.org - EUVDVulnerability recordEUVD-2025-22058
Certain modem models developed by Askey has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and potentially execute arbitrary code.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 23, 2026
- CVE.orgOct 21, 2026
- EUVDOct 21, 2026