CVE-2020-26122 [High] | RCE in Nf8480m5 Firmware

Inspur NF5266M5 through 3.21.2 and other server M5 devices allow remote code execution via administrator privileges. The Baseboard Management Controller (BMC) program of INSPUR server is weak in checking the firmware and lacks the signature verification mechanism, the attacker who obtains the administrator's rights can control the BMC by inserting malicious code into the firmware program and bypassing the current verification mechanism to upgrade the BMC.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.64%	1.16%	+0.53%
2	2025-12-09	0.66%	0.64%	-0.02%
3	2025-03-30	—	0.66%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.64%

1.16%

+0.53%

2025-12-09

0.66%

0.64%

-0.02%

2025-03-30

—

0.66%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.2	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:H/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:H) They need powerful rights—admin, root, or similar—before this pays off. 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.	1.2	5.9	[email protected]
6.5	2.0	MEDIUM	`AV:N/AC:L/Au:S/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:S) A single authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	8.0	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.2

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/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:H): They need powerful rights—admin, root, or similar—before this pays off.
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.

1.2

5.9

[email protected]

6.5

2.0

MEDIUM

AV:N/AC:L/Au:S/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:S): A single authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

8.0

6.4

[email protected]

Affected software / configurations for CVE-2020-26122

Vendor	Product	Version	Raw CPE
inspur	nf8480m5_firmware	< 1.19.34	cpe:2.3:o:inspur:nf8480m5_firmware::::::::
inspur	nf8260m5_firmware	< 1.19.34	cpe:2.3:o:inspur:nf8260m5_firmware::::::::
inspur	ns5162m5_firmware	< 4.5.3	cpe:2.3:o:inspur:ns5162m5_firmware::::::::
inspur	ns5488m5_firmware	< 1.19.33	cpe:2.3:o:inspur:ns5488m5_firmware::::::::
inspur	ns5484m5_firmware	< 1.19.33	cpe:2.3:o:inspur:ns5484m5_firmware::::::::
inspur	ns5482m5_firmware	< 1.19.33	cpe:2.3:o:inspur:ns5482m5_firmware::::::::
inspur	nf5280m5_firmware	< 4.26.6	cpe:2.3:o:inspur:nf5280m5_firmware::::::::
inspur	nf5468m5_firmware	< 1.18.51	cpe:2.3:o:inspur:nf5468m5_firmware::::::::
inspur	nf5488m5-d_firmware	< 1.18.51	cpe:2.3:o:inspur:nf5488m5-d_firmware::::::::
inspur	nf5180m5_firmware	< 4.18.2	cpe:2.3:o:inspur:nf5180m5_firmware::::::::
inspur	nf5270m5_firmware	< 4.9.1	cpe:2.3:o:inspur:nf5270m5_firmware::::::::
inspur	nf5260m5_firmware	< 3.8.0	cpe:2.3:o:inspur:nf5260m5_firmware::::::::
inspur	nf5266m5_firmware	< 3.21.3	cpe:2.3:o:inspur:nf5266m5_firmware::::::::
inspur	nf5466m5_firmware	< 4.28.0	cpe:2.3:o:inspur:nf5466m5_firmware::::::::
inspur	nf5486m5_firmware	< 3.22.0	cpe:2.3:o:inspur:nf5486m5_firmware::::::::

References for CVE-2020-26122

URL	Tags
https://en.inspur.com/en/2487134/index.html	Broken Link
https://en.inspur.com/en/security_bulletins/security_advisory2/2543921/index.html	Vendor Advisory

URL

CVE-2020-26122

Exploit prediction scoring system (EPSS) score for CVE-2020-26122

Common vulnerability scoring system (CVSS) metrics for CVE-2020-26122

Weakness enumeration for CVE-2020-26122

Affected software / configurations for CVE-2020-26122

References for CVE-2020-26122