The US Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2015-5477, a ISC BIND Data Processing Errors Vulnerability, to its Known Exploited Vulnerabilities (KEV) catalog on October 8, 2026. CISA adds a flaw to the catalog when it has reliable evidence that attackers are exploiting it in the wild.
What CISA says
ISC BIND contains a data processing errors vulnerability that could allow remote attackers to cause a denial of service via TKEY queries.
— CISA KEV catalog entry for CVE-2015-5477
Key facts
| CVE | CVE-2015-5477 |
|---|---|
| Vendor / product | ISC BIND |
| Added to KEV | October 8, 2026 |
| Federal deadline | October 11, 2026 |
| Known ransomware use | Unknown |
| Weakness (CWE) | CWE-19 |
| CISA forensic triage | No |
Who has to act, and by when
US federal civilian executive branch agencies are required to remediate the vulnerability by October 11, 2026. CISA urges all organizations to prioritize KEV-listed flaws as part of their vulnerability management.
CISA’s required action for this entry:
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
References
- CISA Known Exploited Vulnerabilities Catalog https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- NIST NVD — CVE-2015-5477 https://nvd.nist.gov/vuln/detail/CVE-2015-5477
- web.archive.org https://web.archive.org/web/20150729014733/https://kb.isc.org/article/AA-01272
- access.redhat.com https://access.redhat.com/errata/RHSA-2015:1513.html
- supportportal.juniper.net https://supportportal.juniper.net/s/article/2016-01-Security-Bulletin-Junos-Vulnerability-in-ISC-BIND-named-CVE-2015-5477
- www.cisa.gov https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- www.cisa.gov https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk