CVE-2016-8503

Yandex Protect Anti-phishing warning in Yandex Browser for desktop from version 16.7 to 16.9 could be used by remote attacker for brute-forcing passwords from important web-resource with special JavaScript.

Published: 2016-10-26 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-8503 is rated Moderate Risk (50.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.00%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2016-8503

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 0.18% 1.00% +0.82%
2 2025-03-17 0.14% 0.18% +0.05%
3 2023-03-07 — 0.14% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-8503

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.3 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L 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:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 3.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N 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:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-8503

Affected software / configurations for CVE-2016-8503

Vendor Product Version Raw CPE
yandex yandex_browser 16.7.0.3342 cpe:2.3:a:yandex:yandex_browser:16.7.0.3342:*:*:*:*:*:*:*
yandex yandex_browser 16.7.1.20808 cpe:2.3:a:yandex:yandex_browser:16.7.1.20808:*:*:*:*:*:*:*
yandex yandex_browser 16.9.1.1131 cpe:2.3:a:yandex:yandex_browser:16.9.1.1131:*:*:*:*:*:*:*

References for CVE-2016-8503

URL Tags
http://www.securityfocus.com/bid/93921 Third Party Advisory VDB Entry
https://browser.yandex.com/security/changelogs/ Release Notes Vendor Advisory
cvelogic Threat Intelligence