How severe is CVE-2020-5826?

CVE-2020-5826 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-5826 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5826?

CVE-2020-5826 primarily affects Symantec Endpoint Protection. In total, 77 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-5826?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-5826 published?

CVE-2020-5826 was published on 2020-02-11 and last updated on 2026-06-17.

CVE-2020-5826

CVE-2020-5826 is a medium-severity vulnerability in Symantec Endpoint Protection with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Symantec Endpoint Protection
Published: 2020-02-11
Last modified: 2026-06-17

Description

Symantec Endpoint Protection (SEP) and Symantec Endpoint Protection Small Business Edition (SEP SBE), prior to 14.2 RU2 MP1 and prior to 14.2.5569.2100 respectively, may be susceptible to an out of bounds vulnerability, which is a type of issue that results in an existing application reading memory outside of the bounds of the memory that had been allocated to the program.

Frequently asked questions

What is CVE-2020-5826?: Symantec Endpoint Protection (SEP) and Symantec Endpoint Protection Small Business Edition (SEP SBE), prior to 14.2 RU2 MP1 and prior to 14.2.5569.2100 respectively, may be susceptible to an out of bounds vulnerability, which is a type of issue that results in an existing application reading memory outside of the bounds of the memory that had been allocated to the program.
How severe is CVE-2020-5826?: CVE-2020-5826 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-5826 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5826?: CVE-2020-5826 primarily affects Symantec Endpoint Protection. In total, 77 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-5826?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-5826 published?: CVE-2020-5826 was published on 2020-02-11 and last updated on 2026-06-17.

References

https://support.symantec.com/us/en/article.SYMSA1505.html

Affected products (77)

cpe:2.3:a:symantec:endpoint_protection:11.0:-:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:mr1:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:mr2:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:mr3:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:mr4:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:mr4-mp1a:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:mr4-mp2:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru5:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru6:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru6-mp1:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru6-mp2:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru6-mp3:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru6a:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru7:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru7-mp1:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru7-mp2:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru7-mp3:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru7-mp4:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0:ru7-mp4a:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:-:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru1:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru1-p1:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru2:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru2-mp1:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru3:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru4:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru4-mp1:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru4-mp1a:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru4-mp1b:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru4a:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru5:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru6:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru6-mp1:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru6-mp2:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru6-mp3:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru6-mp4:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru6-mp5:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru6-mp6:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru6-mp7:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:12.1:ru6-mp8:*:*:*:*:*:*

More vulnerabilities in Symantec Endpoint Protection

CVE-2010-0108 — Critical (CVSS 10.0): Buffer overflow in the cliproxy.objects.1 ActiveX control in the Symantec Client Proxy (CLIproxy.dll) in Symantec…
CVE-2009-1429 — Critical (CVSS 10.0): The Intel LANDesk Common Base Agent (CBA) in Symantec Alert Management System 2 (AMS2), as used in Symantec System…
CVE-2016-3645 — Critical (CVSS 9.8): Integer overflow in the TNEF unpacker in the AntiVirus Decomposer engine in Symantec Advanced Threat Protection (ATP);…
CVE-2012-4953 — Critical (CVSS 9.3): The decomposer engine in Symantec Endpoint Protection (SEP) 11.0, Symantec Endpoint Protection Small Business Edition…
CVE-2012-0295 — Critical (CVSS 9.3): The Manager service in the management console in Symantec Endpoint Protection (SEP) 12.1 before 12.1 RU1-MP1 allows…
CVE-2009-1431 — Critical (CVSS 9.3): XFR.EXE in the Intel File Transfer service in the console in Symantec Alert Management System 2 (AMS2), as used in…

All CVEs affecting Symantec Endpoint Protection →

Other CWE-125 (Out-of-bounds Read) vulnerabilities

CVE-2026-24826 — Critical (CVSS 10.0): Out-of-bounds Write, Divide By Zero, NULL Pointer Dereference, Use of Uninitialized Resource, Out-of-bounds Read,…
CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

Browse all CWE-125 (Out-of-bounds Read) vulnerabilities →