Public proof of concept

CVE-2016-2776

A public proof of concept exists; no exploitation attested.

Published2016-09-28
WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

buffer.c in named in ISC BIND 9 before 9.9.9-P3, 9.10.x before 9.10.4-P3, and 9.11.x before 9.11.0rc3 does not properly construct responses, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted query.

Timeline

dates in UTC

2016-09-2810:59CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-2776?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-2776?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Isc bind

Branch	Affected	Fixed in	Source
9.9	≤ 9.9.9	no fix published	NVD
9.10	= 9.10.0	no fix published	NVD
9.10	= 9.10.1	no fix published	NVD
9.10	= 9.10.2	no fix published	NVD
9.10	= 9.10.3	no fix published	NVD
9.10	= 9.10.4	no fix published	NVD
9.11	= 9.11.0	no fix published	NVD

Oracle linux

Branch	Affected	Fixed in	Source
5.0	= 5.0	no fix published	NVD
6.x	= 6	no fix published	NVD
7.x	= 7	no fix published	NVD

Oracle vm server

Branch	Affected	Fixed in	Source
3.2	= 3.2	no fix published	NVD
3.3	= 3.3	no fix published	NVD
3.4	= 3.4	no fix published	NVD

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

kb.isc.orgVendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedinfobyte/CVE-2016-2776

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.07.8read 2026-10-23
NVDweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score89.5 %read 2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2016-09-28
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-2776?

Is CVE-2016-2776 actively exploited?

Active exploitation of CVE-2016-2776 has not been confirmed. Its EPSS score was 89.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-2776?

CVE-2016-2776 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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