CVE-2016-8704

Exp

An integer overflow in the process_bin_append_prepend function in Memcached, which is responsible for processing multiple commands of Memcached binary protocol, can be abused to cause heap overflow and lead to remote code execution.

Published: 2017-01-06 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-8704 is rated High Exploit Risk (93.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 23.17%, 97th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +15.40% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2016-8704

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-8704

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 7.78% 23.17% +15.40%
2 2026-06-14 14.34% 7.78% -6.56%
3 2026-03-12 — 14.34% —

Full EPSS history (48 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-8704

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2016-8704

OS Trackers for CVE-2016-8704

vendor priority summary link
debian not yet assigned CVE-2016-8704 not yet assigned priority: Debian including 1 source packages (memcached), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-8704
gentoo normal CVE-2016-8704: 1 GLSA(s) (201701-12), 1 atom(s) (net-misc/memcached); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-8704
redhat high — https://access.redhat.com/security/cve/CVE-2016-8704
suse medium CVE-2016-8704 severity moderate: SUSE including 19 source package names (memcached, memcached-1.4.15-10.el7_3.1, …), 39 product×package rows across 27 product lines (SUSE Cloud 5, SUSE Enterprise Storage 4, … (27 product lines)): Fixed 30, Known Not Affected 9. https://www.suse.com/security/cve/CVE-2016-8704/
ubuntu high CVE-2016-8704 high priority: Ubuntu including 1 source packages (memcached), 5 status rows across 5 suites (precise, trusty, upstream, xenial, yakkety): released 5. https://ubuntu.com/security/CVE-2016-8704

Affected software / configurations for CVE-2016-8704

Vendor Product Version Raw CPE
memcached memcached <= 1.4.31 cpe:2.3:a:memcached:memcached:*:*:*:*:*:*:*:*

References for CVE-2016-8704

cvelogic Threat Intelligence